Equipment Crew Tech Thread

[keyboardworkout]

The NUC arrived today.

Is it quiet? I believe it has at least one internal fan.

The idea of a quiet desktop sounds intriguing.

[KBKB]

Is it quiet? I believe it has at least one internal fan.

The idea of a quiet desktop sounds intriguing.

Yes, it has a fan.

I can hear it when I put my ear next to it. It's way, way quieter than anything else with a fan or mechanical drive in my office. If you were to place it in a very quiet room, I would guess that you might be able to hear it when the fan is running. My office has too much other fan noise for me to be able to tell though.

[vhd16]

I was hoping that someone else would answer this because I'm not an expert on this sort of thing. However, it seems that the minimal requirements for running office will likely be met by pretty much any laptop that you might buy right now. According
to Microsoft's site, the Office 2019 suite (for business) requires a 1.6 GHz or faster processor, 4GB RAM, 4GB disk space, 1280x768 screen resolution, DirectX 9 or later graphics acceleration.

Those minimal specs aren't going to be ideal, but most laptops these days should exceed those minimal specs.

Hopefully someone else will be able to provide some actual suggestions...

It is not the office SW that would be the issue
It is the OS on prepackaged laptops
For this purpose I would get one with at least 8 GB RAM
If the OS is Windows 10 then either 12 GB air 16GB would be better
As per the models ,I am in the market as well windows one
Swimmer is there a budget for the laptop ?

[KBKB]

Since the discussion moved to computers - what are some of the labtops out right now that's ideal for using with Microsoft Office (mainly Excel)?

I was hoping that someone else would answer this because I'm not an expert on this sort of thing. However, it seems that the minimal requirements for running office will likely be met by pretty much any laptop that you might buy right now. According
to Microsoft's site, the Office 2019 suite (for business) requires a 1.6 GHz or faster processor, 4GB RAM, 4GB disk space, 1280x768 screen resolution, DirectX 9 or later graphics acceleration.

Those minimal specs aren't going to be ideal, but most laptops these days should exceed those minimal specs.

Hopefully someone else will be able to provide some actual suggestions...

It is not the office SW that would be the issue
It is the OS on prepackaged laptops
For this purpose I would get one with at least 8 GB RAM
If the OS is Windows 10 then either 12 GB air 16GB would be better
As per the models ,I am in the market as well windows one
Swimmer is there a budget for the laptop ?

FWIW, I purchased an HP laptop for my son last Christmas. The key specs are:

• 17.3 inch 1920x1080 IPS screen (IPS displays are better for color rendition, but they cost more)
• Intel Core i7-7500U processor: 2.7 GHz base frequency, 3.5 GHz turbo, 2 cores / 4 threads, 4 MB cache (SmartCache, whatever that is)
• 16GB RAM
• 1 TB hard drive - I think it's a mechanical drive, not an SSD
• Windows 10 Home 64-bit

Here's a link: https://www.amazon.com/gp/product/B07551S9CJ/

Given that it's a 2017 model, I'm a little surprised to see that it's still available.

My son uses it daily. He's been happy with it. I think he's only had one issue with it. A few months ago, the keyboard became flaky - the space bar had stopped working consistently. It was repaired under warranty at no cost to my son. I was impressed - they sent him a box with pre-paid shipping label attached. My son shipped it to the service center and it was shipped back in a few days after being repaired. (HP has even better warranties available too. My daughter has a much more expensive HP laptop on which the screen died after the laptop was dropped. HP sent someone to fix it. I had a similar warranty experience with an HP laptop that I own - on mine the keyboard had stopped working.)

With regard to minimal specs, here's what I would look at:

Processor: Get a processor with two or more cores. As for AMD versus Intel, I don't think it matters much right now. I've been typing in searches like "AMD ryzen 2950x vs Intel Core i9-9900k" into google and then looking at the results from cpu.userbenchmark.com.

RAM: 16GB minimum. Your OS or application might not actually need that much right now, but it might in two or three years time. Plus, the OS is able to use RAM for caching blocks from files on disk. (Linux has worked this way for years; I would expect that Windows 10 does something similar.)

Disk: Get an SSD instead of a mechanical hard disk. It'll be faster and more reliable too. As for capacity, get at least 500GB. It'll be more future-proof if you get 1TB or more.

[KBKB]

Okay, so in addition to the Intel NUC, I also built a much larger machine over the holidays.

The RAM that I purchased came with a pair of fan assemblies which are supposed to be mounted above the RAM. I haven't done this yet, mostly because I think that it'll clutter things up. I'm also skeptical that it'll do much to improve stability or operating temperatures. I'm not overclocking, nor do I plan to.

Has anyone here done a build that includes cooling fans for the RAM?

[KBKB]

I ordered one of these too:

https://www.amazon.com/gp/product/B01FWIAQBC/

It's a 32GB DOM (disk-on-module). I'll use it for the NAS4Free (or maybe FreeNAS) installation. In either case, it's way bigger than what I need.

NICE!
Let me know how that Sata Dom 32gb storage thingy works.
It looks like it would block adjacent sata ports, but I could easily be wrong. If you're not using any onboard ports, then there's nothing to worry about. That's just what came to mind w/ the width of the "drive."

Okay, so that ADATA DOM (Disk-On-Module) that I used in my FreeNAS machine has died. It may have been bad for quite a while already - sadly, with these things you sometimes don't find out until you try to boot and see some problems.

I had the boot drive mirrored with a USB flash drive, so I didn't lose anything, though it did take me a while to figure out which of the drives was bad. Once I worked that out, it seems that FreeNAS automagically fixed the problem for me by grabbing another of the USB sticks that I had installed and then adding it to the ZFS mirror for me.

Between then and now, M.2 has gotten a lot more popular. I'm using some Samsung 970 EVO cards (M.2 form factor) in my new build. That would have been a nice option for the NAS that I built back in 2016.

In the course of building my new machine, I did some work related benchmarking. I timed the building of an open source project that I work on and found that with both sources and build tree in an NFS mounted directory backed by ZFS, the build was taking nearly 20 minutes to complete. When I built on a "local" disk (though in a virtual machine and thus still backed by ZFS), the build took around two minutes. I added an Intel Optane device (which also connects to an M.2 slot) for use as the SLOG/ZIL and also for the L2ARC. Adding the separate ZIL (ZFS Intent Log) made a tremendous difference on performance. That operation that had previously taken about 20 minutes to complete can now be done in under 3 minutes. The performance isn't quite as good as running it on a local disk, but it's pretty close.

[Synthetickiller]

Okay, so in addition to the Intel NUC, I also built a much larger machine over the holidays.

The RAM that I purchased came with a pair of fan assemblies which are supposed to be mounted above the RAM. I haven't done this yet, mostly because I think that it'll clutter things up. I'm also skeptical that it'll do much to improve stability or operating temperatures. I'm not overclocking, nor do I plan to.

Has anyone here done a build that includes cooling fans for the RAM?

What ram is it? Corsair Dominator or some other high end kit?
Could you link the kit? A lot of high performance, low latency kits require higher voltage, so fans are required for stability. I always try to get air flow over my ram kits because I usually tweak settings & bump voltage. Ram waterblocks exist for this reason. I've never used one though.

[KBKB]

What ram is it? Corsair Dominator or some other high end kit?
Could you link the kit? A lot of high performance, low latency kits require higher voltage, so fans are required for stability. I always try to get air flow over my ram kits because I usually tweak settings & bump voltage. Ram waterblocks exist for this reason. I've never used one though.

This is Amazon's title for it: Corsair Vengeance LPX 128GB (8x16GB) DDR4 DRAM 2666MHz (PC4 21300) C16 Memory Kit - Black

Here's the link:

https://www.amazon.com/gp/product/B019HVRT5G/

I haven't done any OC type of tweaking.

When I purchased the RAM, I didn't know that it would come with fans, though after looking at Amazon's page again, I see that they're shown midway down the page.

[Synthetickiller]

This is Amazon's title for it: Corsair Vengeance LPX 128GB (8x16GB) DDR4 DRAM 2666MHz (PC4 21300) C16 Memory Kit - Black

Here's the link:

https://www.amazon.com/gp/product/B019HVRT5G/

I haven't done any OC type of tweaking.

When I purchased the RAM, I didn't know that it would come with fans, though after looking at Amazon's page again, I see that they're shown midway down the page.

I think the Dominator kits used to come with fan kits (ram in excess of 2.0v back in ddr2/3 days).
Corsiar makes a "dominator platinum" and "Vengence" ram coolers. They are $67 and $31 respectively on amazon.

How is your case's airflow? Is there air moving over the ram? If so, you should be fine.
Are you experiencing crashing or stuttering?

[KBKB]

I think the Dominator kits used to come with fan kits (ram in excess of 2.0v back in ddr2/3 days).
Corsiar makes a "dominator platinum" and "Vengence" ram coolers. They are $67 and $31 respectively on amazon.

How is your case's airflow? Is there air moving over the ram? If so, you should be fine.
Are you experiencing crashing or stuttering?

Airflow is pretty good, I think. I bought a gaming case - this one: https://www.amazon.com/gp/product/B0058P5S9A/ . It has a fan pulling air in at the front and three fans expelling air at the side, rear, and top. I also installed two of SuperMicro's mobile racks that hold five desktop (3.5") drives each. As you know, these bays have two fans apiece which pull air from past the drives from the outside. The only other fan is the CPU cooler fan - that one is a 140mm fan from Noctua. Here's a link for the heatsink/cooler: https://www.amazon.com/gp/product/B074DX2SX7/ .

I would guess that there is air moving past the RAM, though the sticks are arranged orthogonal to the airflow. It's entirely possible - likely even - that there are spots which are hotter than others.

With regard to crashing - I've only had one crash that I can't explain. There have been a number of other crashes which were due to me not doing the iommu/vfio passthrough correctly. I have to tell the linux kernel not to grab two of the video cards that I'm using for VMs in the machine. When I fail to do this and then start one or both of the VMs, the system will crash after about ten minutes - a message is printed to the console. (After having gotten things working, I decided that I wanted the boot/root partition for the host OS/hypervisor to also be ZFS. In the course of getting it working, the iommu/vfio passthrough stuff stopped working which led to quite a few crashes until I disabled the automatic boot-up of the VMs.)

Hmm... I don't think I've said much about my new machine yet.

In mid-December, I got the itch to build a new machine. I had been thinking about updating my Windows machine for a while, but I had built it in a mini-ITX case and wasn't able to find a motherboard which maxes out at 64GB of memory. My linux desktop was even older, and I kind of wanted to update it too.

I decided to update both by building just one new machine. I had been hearing about running VMs where the VM directly (more or less) controls a graphics card and that sounded like a fun project to me. So the host OS is CentOS 7.6 running a recent linux kernel. I'm also running two VMs - one is running Windows 10 and the other is running Fedora 29. Both of these OSes have control over one video card. There's a third video card too so that I can see console messages from the host/hypervisor. The video cards for the guest OSes both use AMD chipsets; one's an RX 580, the other is an RX 570. The host OS's video card is a less expensive Nvidia card (GT 710).

CPU is an AMD Ryzen TR 2950X - 16 core / 32 thread. 128GB RAM (as mentioned earlier) ; I wish now that I would have gotten ECC memory, but I didn't know at the time that the motherboard that I ended up using would support it - it does. 8 (old) 4TB drives that I re-purposed for this project; they're put into a pool of just one vdev using RAIDZ3. There's still room for adding another 8 drives if needed. Motherboard is another gaming part: ASRock X399 Professional Gaming sTR4. I also put in a HBA for driving extra disks. Oh, and for ZFS's ZIL/SLOG and L2ARC, I got an Intel Optane 905P. Use of a fast separate device for the ZIL has made a tremendous difference in performance for some of my workflow.

I'm really bad at staying up to date on my Linux destop, mainly because I end up with a lot of stuff open and don't want to reboot and lose all of the context. Also, when I install a new version of Fedora, it usually takes a day or two to sort out all of the things which should work, but no longer work. From now on, I figure I'll be able to install a new release in a VM and give it a try in a VNC window. Once I get everything installed and am happy with it, I can deploy it by connecting it to the three PCI devices I'm presently using for my Linux desktop. If it doesn't work out, I still have the old VM image and can just continue using it instead.

I have two ZFS pools on the host; one is for providing storage to the VMs - it's formed from the eight hard disks mentioned earlier. The other is a mirrored pool for the host's root filesystem. I create virtual disks for the VMs using a command like "zfs create -V 2TB tank/windows10-vm". I have automatic snapshots set up so that I can roll back if needed. So, if some less than desirable update happens to the OS in any of my VMs, I can restore back to some known working point. I can even preserve the "future" point and create a clone of the volume at some point in the past to see how things behaved. I wanted the same kind of protection for the host/hypervisor too, so I also put the host's root filesystem in its own mirrored pool.

Home directories and other data (e.g. my photo files) are off on the NAS that I built. I recently put in a 10G link between these two machines. In my testing of large file transfers, the bottleneck isn't the network connection, it's writing to the disk.

[KBKB]

I recently started renting a cheap VPS from interserver.net. One core, 2GB of RAM, 30GB of SSD space, and 2TB of data (in/out over their network) per month. It's costing me $6 per month, though I got something of a discount having paid for the year.

My intent was to forward tcp ports 80 and 443 to one of my VMs at home upon which I'm running Nextcloud. My ISP blocks port 80 and port 80 access is needed to use the Letsencrypt ACME client for obtaining a (free) SSL certificate. I since found out that there are other ACME clients (such as acme.sh) which can verify control of a machine using only port 443. In any case, I got it working both ways - with port forwarding through the VPS and also without, by using acme.sh.

The point of running Nextcloud is to provide my daughter and other family members a place to back up their data. My daughter had an incident with her laptop last year which necessitated (according to the help that she got) a re-installation of Windows. She lost some work though she claims that it wasn't that much.

Once the Nextcloud client app is installed on your laptop, all you need to do is drag files into the "Nextcloud" folder to synchronize them to the server. Also, any other devices that you have connected in a similar fashion will see those same changes in their Nextcloud folders. You could, I suppose also just do all of your work in the Nextcloud folder - every time you make a change, it gets synchronized to the server and all other clients too.

Syncthing provides similar functionality, but it (IMO) isn't quite as polished yet. Nextcloud also provides a lot of other functionality, including such things as video conferencing.

The VPS that I'm using has been a target of hacking attempts. When I logged in yesterday, I saw:

Last failed login: Tue Jan 29 16:15:14 MST 2019 from shpd-178-69-238-69.vologda.ru on ssh:notty
There were 47 failed login attempts since the last successful login.

Hmm... Russian hackers.

And when I logged in today, I saw this:

Last failed login: Wed Jan 30 15:53:25 MST 2019 from 155.94.181.2 on ssh:notty
There were 74 failed login attempts since the last successful login.

It seems that 155.94.181.2 is in California though. I checked several other address that appear in /var/log/secure. Most of the ones that I checked were from China.

[Synthetickiller]

Is anyone upgrading to ryzen 3000 this summer / fall?

[Domicron]

Is anyone upgrading to ryzen 3000 this summer / fall?

i can never justify the price of brand new tech. also i finally finished fiddling with my current rig and have weaned myself off the sale sites...

i might build a simple pc to replace the aging pc in the restaurant office, but that won't be anything fun

[KBKB]

Is anyone upgrading to ryzen 3000 this summer / fall?

I'd like to, but I can't justify it after building a new machine only six months ago. (I built a machine based on the Ryzen TR 2950X in December.)

I'll probably wait at least until whatever comes after the current/upcoming generation.

[Synthetickiller]

i can never justify the price of brand new tech. also i finally finished fiddling with my current rig and have weaned myself off the sale sites...

i might build a simple pc to replace the aging pc in the restaurant office, but that won't be anything fun

The old ryzen stuff is pretty cheap. I wouldn't get less than a 6c/12t cpu at this point for really cheap.
Seems like browsers eat up ram and 8gb isn't enough these days.

I'd like to, but I can't justify it after building a new machine only six months ago. (I built a machine based on the Ryzen TR 2950X in December.)

I'll probably wait at least until whatever comes after the current/upcoming generation.

I am waiting to see how results stack up. I'll either get the 3950x and OC it or wait for threadripper. I don't need more than 16 cores, but I am wondering if more PCIe lanes for NVME drives will be worth it. I was going to consider the Asus Crosshair 8 Forumal (I want to WC the VRMs and that saves me a lot of time), but $700 for a mobo is asking a LOT. If threadripper boards are not really anymore expensive than am4 boards this time, it might be worth it to jump to TR4. I'd have a solid upgrade path of either high core count CPUs in the coming years or at least 1 more generation if I want to do a cpu upgrade. I doubt PCIe 4 will get maxed out in the coming years, considering we don't even max out PCIe 3.0 on the consumer side w/ any video cards, I can't see the spec getting pushed away for pcie 5.0 immediately.

Thoughts?

[KBKB]

I am waiting to see how results stack up. I'll either get the 3950x and OC it or wait for threadripper. I don't need more than 16 cores, but I am wondering if more PCIe lanes for NVME drives will be worth it. I was going to consider the Asus Crosshair 8 Forumal (I want to WC the VRMs and that saves me a lot of time), but $700 for a mobo is asking a LOT. If threadripper boards are not really anymore expensive than am4 boards this time, it might be worth it to jump to TR4. I'd have a solid upgrade path of either high core count CPUs in the coming years or at least 1 more generation if I want to do a cpu upgrade. I doubt PCIe 4 will get maxed out in the coming years, considering we don't even max out PCIe 3.0 on the consumer side w/ any video cards, I can't see the spec getting pushed away for pcie 5.0 immediately.

Thoughts?

I think it's definitely worth waiting for independent benchmark results. PCIe 4 sounds really cool, but it might be worth waiting for at least one motherboard generation (or a bunch of positive reviews) for that to shake out too.

As for AM4 vs TR4... has AMD made any announcements of new products which will use the TR4 socket? I would guess that the greater number of contacts (just over 3X) on the TR4 would allow for more PCIe 4 slots. (Just a guess though - I haven't studied the pin-out to see what the contacts are actually used for.)

[KBKB]

Below is a photo of a recent build on top of a Streacom BC1 Open Benchtable. The benchtable made it easy to do bring-up / testing.

The only problems I ran into while using it were: 1) One of the PCIe standoffs had messy threads which I had to clean up with a die before I could screw it into the benchtable. 2) I ran out of 6#32 thumbscrews; they provide six of them; you're supposed to use three to attach the power supply, but if you want to attach two disk drives to the bottom of the chassis, you need four more, so you'll be one short.

[EricAtl]

Below is a photo of a recent build on top of a Streacom BC1 Open Benchtable. The benchtable made it easy to do bring-up / testing.

The only problems I ran into while using it were: 1) One of the PCIe standoffs had messy threads which I had to clean up with a die before I could screw it into the benchtable. 2) I ran out of 6#32 thumbscrews; they provide six of them; you're supposed to use three to attach the power supply, but if you want to attach two disk drives to the bottom of the chassis, you need four more, so you'll be one short.

Very cool!

[urbanlifter]

And how are your Spigen cases? Didn't the dog catch up with it? Did it last long?

Holy cow, completely forgot about this tech thread! Honestly, I have no clue about the case. That was probably three phones ago now, ended up having issues with the HTC then went to a Google phone (which was great). Now I have the Galaxy S21 Plus and it's been one of the best phones I've ever had.

On the topic of tech though, I did pick up a cool little gadget recently for running. The Garmin 245 Music, it links directly to my Amazon Music account which is great since I pay for the Unlimited plan monthly. Also has a ton of features to track your daily health stats, which I haven't fully taken advantage of yet outside of trying to take up running again. Awesome watch so far though!

[bisonp]

I picked up a Garmin Fenix 6 on Black Friday for over 40% off. The GPS is accurate and the battery is awesome, it goes about two weeks on a charge and that's with about 5 hours of GPS use each week. I also like having buttons instead of a touch screen because they always work. In the rain, when I'm sweaty, in the cold.

But a lot of the features I thought would be really useful have turned out to be so flaky and unreliable they are little more than gimmicky distractions. Things like Strava Live Segments, sleep tracking, or even just a basic lifting routine. I'd never pay full price for it.

[radrd]

Holy cow, completely forgot about this tech thread! Honestly, I have no clue about the case. That was probably three phones ago now, ended up having issues with the HTC then went to a Google phone (which was great). Now I have the Galaxy S21 Plus and it's been one of the best phones I've ever had.

I also have the S21+ and it's pretty awesome. No complaints. I also have a Spigen case. Again, no real complaints except it's a little more bulky than my last one, which was also Spigen on my S20. Probably provides a little better protection. It does have a nice little pop-out kickstand on the back that I use when watching videos.

[urbanlifter]

I also have the S21+ and it's pretty awesome. No complaints. I also have a Spigen case. Again, no real complaints except it's a little more bulky than my last one, which was also Spigen on my S20. Probably provides a little better protection. It does have a nice little pop-out kickstand on the back that I use when watching videos.

Good to hear the case works well, I'll have to keep that in mind because I'm on my second Otterbox case and I'm starting to lose faith in the brand. They used to be great but I'm finding the commuter series to lose their shape after about 6 months and they don't fit as tight. Got my wife a new iPhone and we sent her Otterbox back, the quality was even worse than the one I put on my phone so maybe they are just going downhill?

But a lot of the features I thought would be really useful have turned out to be so flaky and unreliable they are little more than gimmicky distractions. Things like Strava Live Segments, sleep tracking, or even just a basic lifting routine. I'd never pay full price for it.

Agree with you there, it's almost too much information and I'm not sure what value that information really is to your training. Aside from saying, "Look honey, my sleep score was a 70 last night!" LOL. Mainly just bought it for the GPS tracking and built in music aspect, plus if I ever hit the commercial gym at work it will be nice to be able to leave my phone in a locker and still listen to music through the Bluetooth on the watch.

[KBKB]

I'm still using a Garmin Fenix 5X Plus purchased in 2018. I'm mostly happy with it.

I use it for tracking time, distance, and GPS track while hiking, mountain biking, etc. So long as I'm not in a canyon, the distance is pretty accurate. I had an earlier Garmin Fenix which was really, really bad at accurately tracking distance.

It works pretty well for navigation while hiking, so long as you use it in the "follow the breadcrumbs" mode. I've never had much luck with attempting to follow the arrow that Garmin devices (also) use.

I don't trust the HRM. There have been times when I'm hiking up a steep hill where it shows my heart rate at some unbelievably low number, like in the 70s or 80s when it should probably be 120 or higher.

The other problem I have with it is getting a good connection to the charging cable, even after cleaning the contacts with rubbing alcohol. Worse still, a bad connection seems to discharge the battery. There have been several times where I've had it charging overnight and find that there's insufficient charge to use it. Or I'll not notice and find that it shuts off after only a few miles into my activity.

And, yeah, there's lots of bells and whistles that I never use.

[Synthetickiller]

Below is a photo of a recent build on top of a Streacom BC1 Open Benchtable. The benchtable made it easy to do bring-up / testing.

The only problems I ran into while using it were: 1) One of the PCIe standoffs had messy threads which I had to clean up with a die before I could screw it into the benchtable. 2) I ran out of 6#32 thumbscrews; they provide six of them; you're supposed to use three to attach the power supply, but if you want to attach two disk drives to the bottom of the chassis, you need four more, so you'll be one short.

I have a banchetto test bench I bought about 10 years ago. I'm eventually getting a 2nd test bench. What made you get the streacom over something like the PrimoChill's Praxis Wetbench?

[KBKB]

What made you get the streacom over something like the PrimoChill's Praxis Wetbench?

Well, mostly ignorance or, possibly, lack of research as I was unaware of the Praxis wetbench until now.

If I built / tested motherboards, GPUs, etc. for a living, the Praxis Wetbench might be a good choice due to the angled mounting surface. Though, thinking about it a bit more, it might be annoying too, especially when seating a CPU - I'd have more confidence if the motherboard / socket where horizontal. But my first thought was that it'd be nice to be able to sit at a work area and plug boards, memory, etc. in and out without having to stand above it.

In any case, for my purposes, I think the Streacom Open Benchtable was a good choice. I tend to build a new machine where I'll need it every two to three years. When not in use, the legs, standoffs, and other attachments all attach to the main surface of the Benchtable. All of the parts will be together and it takes up almost no space when not in use. (Things that you don't use, just stay attached to the main benchtable surface.) I'm storing it (and an updated version) upright on a shelf in my office. They take less than an inch of shelf space.

[KBKB]

In the early days of this thread, there were a few of us who discussed ZFS as I was building a NAS back then. If you have any interest in ZFS, the following info may be of interest to you...

Intel recently announced that they're dropping Optane entirely. See:

https://www.tomshardware.com/news/in...iness-for-good

Optane NVMe devices make really good ZFS SLOG and L2ARC devices, both because they're fast and they have really good endurance. (There are other Optane products too, but I have no experience with them.) It's still possible to buy Optane devices for somewhat reasonable prices. I recently purchased two Optane 905P 960GB SSDs for the next workstation (well, virtualization host for workstations) that I build.

That said, I'll note that you can use ZFS and find it to be perfectly fine without needing a SLOG device. It depends on the workload. I use ZFS as the backing store for NFS and virtual machines. For such a workload, it can make a huge difference.

Recent versions of OpenZFS also include support for a persistent L2ARC, which can make a huge performance difference when your ZFS VDEVs consist of spinning rust in a RAID-Z configuration. On what is now a test machine, I have a pool consisting of a single RAID-Z3 VDEV. It has eight hard drives (not SSDs). It also uses an Optane device for SLOG and L2ARC. Prior to L2ARC persistence, after booting, it'd take a long time to start the various VMs that I ran on the machine. These days, so long as the L2ARC has the data for the VMs cached, it's super quick to start the VMs after rebooting the virtualization host.

[AttyGuy]