Windows 7 I tried many NVIDIA drivers.
441.12
451.48
452.06
457.51
466.27
GTX1060 6gb, 1070, 1080, and 1080ti all report low hashrate, but RTX20xx series show correct speed, this problem started around the time when 4gb cards were loosing speed, when DAG file got over 4gb in size. For couple weeks using -eres 1 or 0 command would help restore full speed, but that was only temporary. GMINER fixed the problem in December. I would rather use PM for all my rigs, remote monitoring is better with PM and Claymores ETHMAN. I will gather all the logs I have if needed, I still have them from different rigs all running Win7.
GMINER v2.38
@develsoftware develsoftware released this on Dec 25, 2020
-fixed performance degradation on Ethash under Windows 7 and Windows 8.1