Well, my card is old now and was never great at F@H (normally 400k ppd), but I also undervolted it and underclocked it (the latter only because it caused
F@H WU errors).
Anyway when I
configured it nearly 2 yrs ago, originally my rig was drawing ~285w running MW@H (and LHC+R@H), then I dropped the GPU vcore from 1150 mV to 1050 mV and system draw dropped to 259w (same loads on CPU and GPU. GPU chip power draw dropped 21w).
So a 8.7% GPU undervolt cut system power usage by 9.1%, and better still it gave a large drop in GPU temp, about 8C!
🙂
After testing with F@H at that voltage, although MW had showed no errors @1350 MHz (stock clock), I had to drop it to 1266 MHz (a 6.2% cut) to get clean runs with F@H! Which interestingly is the RX 480s stock clock rate!
I would give current power figures between stock and undervolted with F@H, but F@H is being very erratic with GPU load and ppd atm, like the past minute it's been mostly sat at 0% GPU load! (although temp's show it isn't totally idle). That's at 1-2% progress, 1 spare CPU core (2 threads) for F@H.
Just checked my Ebuyer account, and I bought the RX 580 in October 2018, way too long ago!
😛
JFYI, in gaming performance it's similar to a 1060 (and was a similar price), although the RX 580's FP64 performance is quiet a lot better (which is why I choose it in the end).
