Joshua explained, and it is also explained here:Werewolf wrote: ↑Mon Dec 03, 2018 2:48 pmLaskos wrote: ↑Mon Nov 19, 2018 3:00 pm Just got and installed it. With one of the latest nets, Lc0 v19 rc5 engine:
UCI commands:
setoption name Backend value cudnn-fp16
setoption name MinibatchSize value 512
setoption name NNCacheSize value 2000000
go
info depth 19 seldepth 52 time 41681 nodes 984582 score cp 27 hashfull 274 nps 23621
info depth 21 seldepth 53 time 69999 nodes 2032430 score cp 26 hashfull 431 nps 29035
info depth 22 seldepth 54 time 93937 nodes 2845554 score cp 26 hashfull 570 nps 30292
Didn't quite expect such speeds, would have been happy even with 18,000-20,000.
Some 5-6 fold improvement over GTX 1060.
My power supply is not that strong (500W), hope it stays well.
I'm not doubting your results Laskos, but I'm struggling to understand them.
Your 1060 card produced about 4.4 TFLOPS FP32. Your 2070 card is around 7.5 TFLOPS FP32 which with the new ability to use FP16 means about 15 TFLOPS.
That should make your 2070 just under 4x faster than your 1060. Instead you report 5-6x improvement.
Happy for you...but confused.
http://talkchess.com/forum3/viewtopic.p ... 8&start=44
The speed-up is at least 5 compared to GTX 1060 in almost any condition, and larger than 6 with both in "ideal" conditions.
Test net is ID11261
With GTX 1060 6GB, in ideal settings, I was never getting more than 5100 NPS with it from starting position, but with my RTX 2070, just now setting these values
setoption name Backend value cudnn-fp16
setoption name MinibatchSize value 512
setoption name NNCacheSize value 5000000
setoption name WeightsFile value .\weights_11261.txt.gz
I am getting from initial position:
info depth 19 seldepth 55 time 243657 nodes 8144964 score cp 29 hashfull 599 nps 33427
Which is 6.5x times the maximum speed from initial position for GTX 1060 6GB I got with correct settings.
But I rarely go to 4 min/move in gameplay, only in analysis. Anyway, setting the correct parameters, my RTX 2070 (non-OCed) is about 6 times faster than my GTX 1060 6GB with correct parameters in almost all time and net ID conditions (at least with these 20x256 nets).
I also checked for possible throttling, in 12 hours at full load, temperature is at max 68C, no any throttling in GPU-Z and no any problem with the power supply (a 500W one, but it seems to not complain).
As I said, I myself didn't expect these speeds from RTX 2070, I was happy if 20,000 NPS is achieved in correct conditions. So, I felt compelled to open a thread here.