So I turned down my power on my 2080TI's from 260 to 175, from 220 down to 175 on my 3070, from 325 to 200 on my 3070TI and from 400 to 250 on my 3080TI. The old total ppd was 46-47 million. I am down to 40 million, and it appears that only SOME of the units reduce the ppd. And the 3080TI is holding 9 millon ppd ! So that works out to 1500 watts for 8 cards 24/7/365 and 40 million ppd. I am happy with the compromise ! Thats 36% reduction in power for a 13% reduction in ppd. and 845 watts saved 24/7/365
Mark, long-time lurker here and yes, I am on another team, but I registered here today to reply specifically to this post.
First, congrats on you folks performance on the BOINC Pentathlon. My Team missed the registration date.
Being close to retirement with a few kids still in Post-Secondary education I only have limited funds for Distributed Computing so I must keep my purchases and Electricity in budget.
I recently picked up a 3070Ti as their pricing has finally reached a reasonable excess over MSRP.
I profiled the card after burning it in a bit to take a look at it's efficiency:
Unlike Pascal and Turing cards which I observed run most efficient at their minimum Power-Limits it seems Ampere's (at least my Asus TUF 3070ti) efficiency falls off a cliff at lower Power-Limits.
What I did was to use HfM.net to watch a new WU and set it to estimate PPD based on the last 3 Frames. I then used the F@H Advanced Control log to show when a frame had just completed then adjusted the Power-Limit to a new set point using
then waited for 6 frames to complete and recorded the PPD estimate at that point and moved to the next set point.
In my case I found the 3070ti seems to run well at 150W.
I also ran some comparisons for a week with a 1070ti, 2070 Super and the 3070ti all at the same 150W Power-Limit to see what the Generational improvement was:
Code:
GPU Yield Eff. Value Gen.
1070ti 1,439,799 9.6 3.0 0.0%
2070s 2,667,237 17.8 4.7 86.5%
3070ti 3,887,798 25.9 6.1 45.7%
Efficiencies (kPPD/W); Value (kPPD/Inflation adjusted MSRP US$) and Generational Improvement (PPD %).