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3-2021 Big Core Options under $2,000.

Posted: Sun Mar 21, 2021 9:15 pm
by cellarnoise2
Sorry, I did not take the time on this forum to find this sub...

I'm interested in learning about the best "low cost" bang for buck server level cpu's. From a bit of searching currently Epyc. Under $2,000 for all hardware.

I'd like to stay air cooled with best bang for buck. Including CPU, cooler, case, MB, power, ect. Like all of the factors :)

From what I know so far, stay ES sample Epyc. Maybe ATX compatible along with ATX power supply. Noctua Air Cooler, Epyc. For most of DC, at least a gig of RAM per thread?

I don't run 24/7 all year, only during the non Air Conditioned months here in Spokane, WA. So normally run puters from October to May. I will likely wait to buy DC stuff until this fall at this point. Maybe best will be single socket Epyc 7003 ES? I'd like to think I could do 64 core with a single GPU?

I am actively trying to purchase a 5950x for my side job with a 3080 for when I have time for any gaming (which as been zero this past year) and DC.

What you all think?

Re: 3-2021 Big Core Options under $2,000.

Posted: Sun Mar 21, 2021 10:20 pm
by crashtech
I like your premise and I want to follow your progress. As far as I could tell last time I looked, Epyc hardware was just too expensive for me. First-gen Naples CPUs are at a disadvantage due to their essentially half-speed AVX2 operation. Second-gen Epyc are really good, but are still pretty expensive afaik. I've been adding Zen2 consumer CPUs to my little fleet, as well as a few Broadwell Xeons. I think this is a tough time to find big compute on the cheap. Pretty much a tough time for silicon in general.

Re: 3-2021 Big Core Options under $2,000.

Posted: Mon Mar 22, 2021 10:19 am
by StefanR5R
From the figures which I have seen so far, the performance and performance/W difference between Rome and Milan is negligible in workloads which scale well to all cores, such as almost all BOINC projects which use CPU but not GPU.

On the used market, there may occasionally be opportunities to snag some Epyc 7V12 (7702 or 7742 variant for Microsoft Azure) or 7B12 (for Google Cloud Platform).

I am not daring myself WRT the 2nd hand market. So far I only occasionally bought used CPUs from European sellers who appeared to be proper businesses. These were still Intel CPUs, LGA2011v3.

Re: 3-2021 Big Core Options under $2,000.

Posted: Mon Mar 22, 2021 7:38 pm
by Icecold
I just looked on eBay again, and couldn't find anything that seemed worth it in the way of Epyc processors available QS/ES or otherwise.

I just checked my eBay purchase history, and I had put together a 28 core/56 thread Dell Precision T7810 in October for the following prices:

Matrox PCIe x1 video card - $20

64GB ECC DDR 2133 - $156

Dell Precision Barebones - had 2 heatsinks, no processors, no RAM. $275

2x Xeon E5-2683 V3 14 core/28 processors - $110 each / $220 total

120GB Sata SSD - I had this already, but I usually pay around $20 for them.

= $691 total, includes shipping but not sales tax. I had to do the 'make an offer' on some of the items to get it as inexpensively as I did, but something similar should still be available if you can be somewhat patient on it and purchase items as good deals are found. Each item was purchased from different sellers, buying it all from one seller would have raised the price considerably. The CPU's are pretty low clocked, but I thought $110 each was a good deal at the time.

If I were to do it all over again I would maybe buy an ATX dual socket 2011-3 motherboard and put it all together myself vs building using a Dell precision, but the costs add up quickly when you need CPU heatsink/fans, power supply, etc.

I've also been getting pretty good deals on Ryzen 3950x's as people upgrade to 5950x's. I know that doesn't really fit this thread, but if it's for something like BOINC where you can scale across multiple machines, a used Ryzen 3950x for $500(but also need to buy all the other parts to go with it) is fairly tough to beat from a PPD per dollar perspective, and is still quite efficient if ran on eco mode.

Re: 3-2021 Big Core Options under $2,000.

Posted: Wed Mar 24, 2021 1:48 am
by Fardringle
The dual Xeon build is an interesting idea for a bunch of cores at a not horrible cost. Not necessarily very economical to run long term, though. Those Xeon E5-2683 V3 processors run 120 Watts each so the power cost will add up a bit over time. Still, for under $700 for a complete system, that's not too bad at all.

The newer Epyc systems are amazing, but certainly not cheap.

Personally, I'd love to upgrade my 3900X to a 3950X or even better a 5950X. But I haven't had any luck finding one that isn't badly overpriced, and I'm pretty hesitant to buy used CPUs since there's no way to know if they have already been abused or not. Even better would be to upgrade the 3900X andput the 3900X in a second system, but that's not in the budget (or available space) plans...

Re: 3-2021 Big Core Options under $2,000.

Posted: Wed Mar 24, 2021 6:39 am
by Icecold
Fwiw I've never had an issue with a used CPU I've bought and over the years I've probably bought 50-100 used CPU's. I've bought them from Anandtech FS/T, Hardforum, eBay etc. It's pretty hard to cause noticable degradation on CPU's and I don't overclock anything I use for DC projects.

Re: 3-2021 Big Core Options under $2,000.

Posted: Wed Mar 24, 2021 8:45 am
by crashtech
I have had good luck with CPUs, but not perfect luck. I've had quite a few Haswell Xeons get to me with at least one memory channel bad.

Looking at prices, performance, and power use, according to my little spreadsheet, the best bang for the buck is simply the 3700X right now. All the Zen3's and Zen2 Epycs are just too expensive right now.

If power use is not a concern, the 2680v4 curb stomps the 2683v3 and can be found for around $160.

Re: 3-2021 Big Core Options under $2,000.

Posted: Wed Mar 24, 2021 10:39 am
by Icecold
crashtech wrote:
Wed Mar 24, 2021 8:45 am
I have had good luck with CPUs, but not perfect luck. I've had quite a few Haswell Xeons get to me with at least one memory channel bad.

Looking at prices, performance, and power use, according to my little spreadsheet, the best bang for the buck is simply the 3700X right now. All the Zen3's and Zen2 Epycs are just too expensive right now.

If power use is not a concern, the 2680v4 curb stomps the 2683v3 and can be found for around $160.
I need to look around again at processors. I was hoping at one point to grab a couple 18 core Broadwells but they were still pretty expensive. The 2680v4 looks like a good option if staying with 14 cores.

Re: 3-2021 Big Core Options under $2,000.

Posted: Wed Mar 24, 2021 1:09 pm
by crashtech
Icecold wrote:
Wed Mar 24, 2021 10:39 am
crashtech wrote:
Wed Mar 24, 2021 8:45 am
I have had good luck with CPUs, but not perfect luck. I've had quite a few Haswell Xeons get to me with at least one memory channel bad.

Looking at prices, performance, and power use, according to my little spreadsheet, the best bang for the buck is simply the 3700X right now. All the Zen3's and Zen2 Epycs are just too expensive right now.

If power use is not a concern, the 2680v4 curb stomps the 2683v3 and can be found for around $160.
I need to look around again at processors. I was hoping at one point to grab a couple 18 core Broadwells but they were still pretty expensive. The 2680v4 looks like a good option if staying with 14 cores.
It's possible that there are better values than the 2680v4 , but one of my CPU selection criteria is that the single thread performance has to be good enough to run a decent GPU. Even the 2680v4 is a bit slow for this (2.9GHz all core) I actually ended up with 2x 2690v4's which were not as good a deal, but are 200MHz faster than the 2680v4 under full load.

I think the beastliest Broadwell that still has a somewhat sane price is the E5-2697Av4, ~$325, 16 cores and 3.1GHz under full load. But all of these CPUs are outperformed in all but a few things by a $250 3700X which uses much less juice.

Re: 3-2021 Big Core Options under $2,000.

Posted: Mon Apr 05, 2021 11:35 pm
by pututu
If anyone is looking for cheap 18-core QS (not ES) haswell (4669v3), systemviper might still have have this for sale for $150 each.https://forums.servethehome.com/index.p ... ual.32404/

I've one and it can run all core at 2.9GHz all day https://hardforum.com/threads/unlocking ... 1043572180. This need some bios hack though which I may have forgotten. Can be found in anandtech forum here https://forums.anandtech.com/threads/wh ... s.2496647/