mersenneforum.org gpuOwL: an OpenCL program for Mersenne primality testing
 Register FAQ Search Today's Posts Mark Forums Read

2020-11-02, 11:51   #2575
axn

Jun 2003

3×5×17×19 Posts

Quote:
 Originally Posted by M344587487 Allow me to be the pessimistic one.
Sure, it is all speculation, and things might not pan out. However, even if power efficiency is not there but raw performance is, it still might be worth it for GIMPS (compared to the general stagnation in (intel) CPU and (nvidia) GPU)

Quote:
 Originally Posted by M344587487 I still maintain that the types of gamer who bought R7 will want to upgrade to big navi so there may be a glut of them on the secondhand market. If big navi doesn't perform for compute or uses too much power to do so then hoovering up R7's is a good plan B.
I believe there are a total of 5000 R7's ever made. So not sure how much will be available, come RX 6000 wide availability. Nonetheless, definitely pick one up if you see one at a reasonable price

Quote:
 Originally Posted by M344587487 Of big navi 6800XT is the one to get, 8 extra CU's and a better bin are likely not worth $350 but$70 for 12 extra CU's seems like a no-brainer.
Agreed, 6800XT appears to be the sweet spot. In fact, a kick ass all-AMD setup with 5900X + 6800XT could be a monster GIMPS platform.

Last fiddled with by axn on 2020-11-02 at 11:52

 2020-11-02, 12:11 #2576 aheeffer   Aug 2020 37 Posts New gpu rig with excelent price/performance I am glad I cancelled my RTX 3080 order. It really disappoints with 1990µsec/it for a 77M exponent. I acguired a Radeon Vega 64 a few days ago at 240 € and I get 1970µsec/it for a 109M exponent. Since my 5 x Radeon VII rig runs at full capacity now, I decided to change strategy and built a cheaper rig using Radeon Vega 64 cards. This is my configuration and price: GPUOWL rig at 800 Ghz-d/d and 24 kwh/d Asrock H110 Pro BTC+ ------ 70 € Intel i3-7100 + cooler ---- 90 € Geil 2 x 8 GB DDR4 3200 --- 60 € Kingston 500 MB nvme SSD -- 55 € 6-pack PCIe risers (China)- 15 € 5 x Arctic F12 fans ------- 16 € Yongse miner case --------- 130 € Corsair HX 1200i ---------- 289 € Total mining case --------- 725 € 5 x Radeon Vega 64 -------- 1200 € I currently have only one Vega 64, but I picked up another Radeon VII at 510 € at a local 2nd hands site. I am waiting patiently for more used cards to come to the market. With the HX1200i I think I can go to 5 cards. I can clock the Vega 64 down with Radeon Adrenalin to 165 W, running 71°C with an acceptable 2010 µsec/it for a 109M exponent.
2020-11-02, 13:34   #2577
kriesel

"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest

37×131 Posts

Quote:
 Originally Posted by M344587487 Of big navi 6800XT is the one to get, 8 extra CU's and a better bin are likely not worth $350 but$70 for 12 extra CU's seems like a no-brainer.
Another way to put that is for about the same money, 2x6900XT or 3x6800XT,
2 x 80 CU vs 3x72 CU, miners and GIMPSters will go for the 6800XT big time.

 2020-11-02, 14:01 #2578 M344587487     "Composite as Heck" Oct 2017 3·5·72 Posts Big Navi may not be a good choice for mining, Ethereum and Monero both need random access to multi-gigabyte data so the infinity cache may only be marginally useful making Navi 1 a better choice. I've been out of the mining loop for years, but last I knew they were the main coins worth mining with everything else trailing massively. 95% of coins were only worth mining for their spot price, with luck the hype and opportunism that plagued mining back then and fueled a lot of the altcoins reason for existing has diminished. The 6800 CU/\$ isn't too much worse than the 6800XT so I wouldn't sweat resorting to the 6800 if supply is low.
2020-11-04, 05:32   #2579
DrobinsonPE

Aug 2020

2×41 Posts

Quote:
 Originally Posted by DrobinsonPE I saw your post and thought it would be an interesting experiment to try gpuowl on my Celeron J4105 with UHD 600 integrated graphics. I got mfakto working on it so why not try gpuowl as well. It looks like it failed on the OpenCL version.
I did a little investigation and discovered one of the reasons why GPUOWL will not work on UHD 600.

Even though UHD 600 supports OpenCL 2.1

https://www.techpowerup.com/gpu-spec...hics-600.c3065

The current Windows 10 driver only supports OpenCL 1.2 for the UHD 600. See page 4 of this document.

2020-11-04, 23:00   #2580
moebius

Jul 2009
Germany

547 Posts

Quote:
 Originally Posted by moebius The Radeon Instinct MI 100 with CDNA architecture (Release 2020) then actually has a memory bandwidth of 1229 GB/s and 32 GB HBM2 and 4.098 TFlops FP 64, but is of course from the professional sector and unaffordable. I think only the A100 will compete with it. https://www.techpowerup.com/gpu-spec...ct-mi100.c3496
The launch is likely to be on November 16, 2020 but with up to 12.5 TFLOPs FP64?
https://wccftech.com/amd-instinct-mi...ches-november/

Last fiddled with by moebius on 2020-11-04 at 23:06

2020-11-05, 04:30   #2581
axn

Jun 2003

484510 Posts

Quote:
 Originally Posted by moebius The launch is likely to be on November 16, 2020 but with up to 12.5 TFLOPs FP64? https://wccftech.com/amd-instinct-mi...ches-november/
While it will be a nice card with probably A100-like performance, it will be priced similarly too. It'd be interesting if there is a "Radeon Pro" equivalent.

 2020-11-05, 09:06 #2582 LaurV Romulan Interpreter     Jun 2011 Thailand 217018 Posts re 3080/3090: Yeah, baby! More and cheaper 2080Ti's for me in the future, when the kids will sell them for peanuts to buy "the new fashion cards" for their gaming rigs... (didn't I say that? Listen to the old salt next time!). Thanks Oliver for benchmarks. @axn re Radeon Pro: there is a Pro VII that can be bought from bandh, quite expensive, and I don't think is so much more performant than a "classic" VII to worth the money difference. Last fiddled with by LaurV on 2020-11-05 at 09:09
2020-11-05, 12:12   #2583
axn

Jun 2003

3·5·17·19 Posts

Quote:
 Originally Posted by LaurV @axn re Radeon Pro: there is a Pro VII that can be bought from bandh, quite expensive, and I don't think is so much more performant than a "classic" VII to worth the money difference.
Yes. But presumably, AMD will keep making next generation "CDNA" Pros while Radeon VIIs are only available in (ever shrinking) secondhand market.

 2020-11-09, 05:11 #2584 DrobinsonPE   Aug 2020 10100102 Posts moebius, This one is for you. Ryzen 3 3200G APU. Code: 2020-11-08 20:18:24 gpuowl v6.11-380-g79ea0cc 2020-11-08 20:18:24 config: -iters 200000 -prp 77936867 2020-11-08 20:18:24 gfx902-0 77936867 FFT: 4M 1K:8:256 (18.58 bpw) 2020-11-08 20:18:27 gfx902-0 OpenCL compilation in 2.85 s 2020-11-08 20:18:32 gfx902-0 Proof using power 8 2020-11-08 20:18:46 gfx902-0 77936867 OK 800 0.00%; 11081 us/it; ETA 9d 23:54; 1579c241dc63eca6 (check 4.48s) 2020-11-08 20:55:27 gfx902-0 Stopping, please wait.. 2020-11-08 20:55:36 gfx902-0 77936867 OK 200000 0.26%; 11071 us/it; ETA 9d 23:03; f0b04b45b0855bd2 (check 4.48s) 2020-11-08 20:55:36 gfx902-0 Exiting because "stop requested" 2020-11-08 20:55:36 gfx902-0 Bye
 2020-11-09, 11:48 #2585 M344587487     "Composite as Heck" Oct 2017 3×5×72 Posts Nice that you got it working. What is your set up, simply the latest ROCm on Mint 20 like you used elsewhere?

 Similar Threads Thread Thread Starter Forum Replies Last Post Bdot GPU Computing 1668 2020-12-22 15:38 xx005fs GpuOwl 0 2019-07-26 21:37 1260 Software 17 2015-08-28 01:35 CRGreathouse Computer Science & Computational Number Theory 18 2013-06-08 19:12 Unregistered Information & Answers 4 2006-10-04 22:38

All times are UTC. The time now is 07:41.

Sat Jan 23 07:41:36 UTC 2021 up 51 days, 3:52, 0 users, load averages: 3.08, 2.68, 2.56