Search found 70 matches

by ankan
Thu Jun 20, 2019 3:19 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Leela Chess Zero 42565 vs Stockfish 140619
Replies: 75
Views: 4889

Re: Leela Chess Zero 42565 vs Stockfish 140619

Pondering makes sense when playing against Leela on a many-core machine, as Leela wouldn't use many CPU threads while thinking, and all other threads would then go to waste. Likewise the GPUs would be idle during Stockfish' turn when Leela is not pondering. If Leela need two unshared cores, you can...
by ankan
Fri Mar 01, 2019 5:13 pm
Forum: Computer Chess Club: General Topics
Topic: Lc0 settings for Leela on GPU- Nvidia RTX 2080
Replies: 11
Views: 1517

Re: Lc0 settings for Leela on GPU- Nvidia RTX 2080

I agree that 2 threads is optimal for single GPU, and you must have --backend=cudnn-fp16 (to get ~2.5X speedup over the default cudnn fp32 backend). Changing some of the settings for more NPS can weaken the search. E.g, I wouldn't suggest increasing minibatch-size more than the default (256). Increa...
by ankan
Fri Mar 01, 2019 4:37 pm
Forum: Computer Chess Club: General Topics
Topic: AMD RYZEN 2950 Speed issue
Replies: 28
Views: 3178

Re: AMD RYZEN 2950 Speed issue

I read all the replies and did not see the biggest issue of the 2950x addressed. On the 2950x 16 cores are directly connected to the memory bus. The other 16 cores are connected to the memory bus through the first 16 cores. This creates a memory bottleneck for the 2nd 16 cores. Chess programs are b...
by ankan
Tue Feb 12, 2019 5:03 pm
Forum: Computer Chess Club: General Topics
Topic: Scorpio+Lc0-32742 vs Stockfish 9
Replies: 13
Views: 2218

Re: Scorpio+Lc0-32742 vs Stockfish 9

./lc0 -t 2 --backend=cudnn --verbose-move-stats --weights=../../../lcnets/ID-11248.gz | _ | | |_ |_ |_| v0.19.1 built Feb 11 2019 go movetime 100000 Loading weights file from: ../../../lcnets/ID-11248.gz Creating backend [cudnn]... For fair comparison, you should use cudnn-fp16 backend for lc0. Jus...
by ankan
Sat Jan 26, 2019 11:42 am
Forum: Computer Chess Club: General Topics
Topic: Big boost in strength for LC0 by simply changing VGA card
Replies: 19
Views: 2844

Re: Big boost in strength for LC0 by simply changing VGA card

Card I am using is now an RTX 2080Ti which reading on the forums seems to indicate would do very well. The previous card was a Quadro M4000 with around 1700 Cuda cores while the RTX 2080Ti has about 3.5x that. I would expect a bigger jump in NPS going from Quadro M4000 to the RTX 2080Ti (something ...
by ankan
Sun Jan 13, 2019 4:05 am
Forum: Computer Chess Club: General Topics
Topic: Dramatic drop in performance with LC0 after updating Cuda drivers
Replies: 14
Views: 2180

Re: Dramatic drop in performance with LC0 after updating Cuda drivers

I think there is some confusion. The 'cudart64_100.dll, cublas64_100.dll, cudnn64_7.dll' files is not part of driver - they are cuda runtime/cublas/cudnn library files. Very early builds of lc0 didn't come with them, so they had to be downloaded separately from nvidia's website (first two are part o...
by ankan
Tue Jan 08, 2019 6:04 pm
Forum: Computer Chess Club: General Topics
Topic: Building a new super fast computer
Replies: 10
Views: 1625

Re: Building a new super fast computer

nabildanial wrote:
Tue Jan 08, 2019 4:52 pm
Will you be updating the list with RTX 2060 too? I'm looking an upgrade for my GTX 1060 too.
I don't have a 2060 to test with, but based on specs I am pretty confident that it won't be more than 20% slower than 2070 (~15% slower most likely).
by ankan
Tue Jan 08, 2019 3:22 pm
Forum: Computer Chess Club: General Topics
Topic: Building a new super fast computer
Replies: 10
Views: 1625

Re: Building a new super fast computer

I plan on building a new super fast computer. I still am not sure whether I am going with Intel or AMD, but that is not the real concern ... my concern is what would be best for NN engines as a GPU card. Is it better to get 2 x 2080 Ti cards or just one Titan V card? Is there anything on the horizo...
by ankan
Sun Dec 23, 2018 1:04 pm
Forum: Computer Chess Club: General Topics
Topic: Smallnet (128x10) run1 progresses remarkably well
Replies: 24
Views: 3548

Re: Smallnet (128x10) run1 progresses remarkably well

The latest v0.20.0 rc1 release has some improvements for CPU bottlenecked scenarios in case you want to try (but don't expect more than 5-10% speedup).
https://github.com/LeelaChessZero/lc0/releases
by ankan
Fri Dec 21, 2018 7:18 pm
Forum: Computer Chess Club: General Topics
Topic: Smallnet (128x10) run1 progresses remarkably well
Replies: 24
Views: 3548

Re: Smallnet (128x10) run1 progresses remarkably well

I have a question about the engine I have: lc0 v0.20-de 12 Dec With older test30 bignets it achieves high NPS from Initial Board position after filling about half of its large chache size, a long time: ID 32112 info depth 17 seldepth 46 time 166191 nodes 7327539 score cp 48 hashfull 426 nps 44091 W...