Guys, I'm still dropping to 1500 per card (two vega 64s with 16GB RAM) after 20-24 hours. Am forced to restart everything to get back to 1900 per card. Can anyone share their insights as to what I might be missing? I have the cards running on a rig I remote into, so no displays attached at all (not even to the onboard video). Maybe I need dummy HDMI dongles? Thanks for any help.
I had the same issue with hashrate going to 1700 and had to restart the miner. I noticed that was happening while i was running anything else than the miner that had to do with the gpu ( HWinfo, afterburner). What i did was to lower a bit the oc settings and i was just fine..
I have similer issue, 2 vega56 with stock bios and identical settings(use registry mod, 1350core@850mv, 935mem@850mv), the first card which is pluged into main PCIEx16 slot keeps 1850H/s, but the second card begins at 1850H/s and drops to 1600H/s after a few minutes run.
it isn't due to hige temp, both of the 2 cards are under 53C.
Windows 10 fall update, blockchine driver, xmr-stak-amd.