Search found 354 matches

by Raphexon
Wed Feb 10, 2021 2:20 pm
Forum: Computer Chess Club: General Topics
Topic: Does anyone here have a Ryzen 5000 CPU?
Replies: 23
Views: 3288

Re: Does anyone here have a Ryzen 5000 CPU?

I got: 1227 (Single-Core Score) 6256 (Multi-Core Score) That's pretty OK for a 4800U when I browser Geekbench for that. My 4700U is expectionally high. It also matters a lot how the cooling system is designed. However, I strongly disadvise against re-pasting the laptop just like that. For one, it's...
by Raphexon
Wed Feb 10, 2021 9:46 am
Forum: Computer Chess Club: General Topics
Topic: Fat Fritz 2
Replies: 491
Views: 29851

Re: Fat Fritz 2

as long as I provide the source code, great... doesn’t make their use of GPL’d software somehow illegal. But they're not. (As already explained several times above) I’ve checked out the code. Check. I’ve built a binary. Check. I’ve run a net in it. Check. What don’t you understand? Does it have ide...
by Raphexon
Sun Jan 31, 2021 12:29 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish LC0: 1-0 1-0 1-0 1-0 1-0 in TCEC
Replies: 6
Views: 1137

Re: Stockfish LC0: 1-0 1-0 1-0 1-0 1-0 in TCEC

Can Leela run on a single GPU? Would a system that runs Stockfish NNUE using a single CPU (multiple cores of course in today's world) with no dedicated GPU cost less than a system built for running Leela (assuming it is possible to have Leela run on a single CPU and a single GPU)? I am ignorant of ...
by Raphexon
Sat Jan 30, 2021 8:58 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish LC0: 1-0 1-0 1-0 1-0 1-0 in TCEC
Replies: 6
Views: 1137

Re: Stockfish LC0: 1-0 1-0 1-0 1-0 1-0 in TCEC

Can Leela run on a single GPU? Would a system that runs Stockfish NNUE using a single CPU (multiple cores of course in today's world) with no dedicated GPU cost less than a system built for running Leela (assuming it is possible to have Leela run on a single CPU and a single GPU)? I am ignorant of ...
by Raphexon
Thu Jan 14, 2021 9:07 am
Forum: Computer Chess Club: General Topics
Topic: NNUE nets with depth of 20?
Replies: 8
Views: 1259

Re: NNUE nets with depth of 20?

It's a quantity vs quality tradeoff. Required nodes to reach a given depth behaves exponentially. A billion positions analyzed to depth 8 takes a 24 hours with a modern 12 core. Depth 12 takes 10 times that. Depth 20 takes (guesstimate) 750-1000 times as long as depth 8. Without distributed generat...
by Raphexon
Thu Jan 14, 2021 8:24 am
Forum: Computer Chess Club: General Topics
Topic: NNUE nets with depth of 20?
Replies: 8
Views: 1259

Re: NNUE nets with depth of 20?

It's a quantity vs quality tradeoff. Required nodes to reach a given depth behaves exponentially. A billion positions analyzed to depth 8 takes a 24 hours with a modern 12 core. Depth 12 takes 10 times that. Depth 20 takes (guesstimate) 750-1000 times as long as depth 8. Without distributed generati...
by Raphexon
Mon Jan 11, 2021 10:03 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish NNUE speed is improved a lot
Replies: 3
Views: 1340

Re: Stockfish NNUE speed is improved a lot

Because in the past NNUE was pure and now it's hybrid.

Most of the speedup comes from classical eval being used on some nodes.
by Raphexon
Thu Jan 07, 2021 7:50 am
Forum: Computer Chess Club: General Topics
Topic: BMI2 vs AVX2 (Stockfish versions)
Replies: 8
Views: 1558

Re: BMI2 vs AVX2 (Stockfish versions)

Hi everybody, Is there a difference between the two? Is one instruction set faster than the other? My CPU (10900k) supports both of them. Thx. Generally speaking, Intel processors that support bmi2 are faster with BMI2. Current AMD processors support bmi2, but are generally faster with AVX2. YMMV, ...
by Raphexon
Tue Dec 29, 2020 11:52 am
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 108
Views: 10225

Re: CCC has serious hardware update!

As with the TCEC rig, the GPUs are very nice, but unfortunately the slow CPUs are a fairly severe handicap for GPU engines like Lc0, which do best with a small number of very fast CPUs. Of course, one could say that it is up to Lc0 to improve its CPU code to better utilize more CPUs, but this is pr...