Any thoughts why my hashrate is dropping?
Either HBCC is turning off somehow (some other program or task starting?) or your fans aren't high enough (put em around at least 3000) to keep the HBM mem cool enough to sustain the high hashrate
I've had the same problem - I don't think it's HBCC, becasue I can restart the miner without touching HBCC and speeds are back to normal. That made me think it was temp - but even with fans over 4000rpm in a cool room it would still happen.
I tried both using the iGPU, as others have suggested, and going into Control Panel - System - Advanced System Settings - Performance Settings, and then switching to adjust for best performance (Disabling all the windows animations). That worked for me.
How much ram do you have?
I switched to iGPU, windows best performance settings set, no programs running (only Windows Defender and Avast).
Added 4gb of ram. Now at 8gb... can see HBCC slider, but it's not movable.
Fans over 3800 rpm... temps never exceed 55C.
I see some difference, it doesn't drop as much as before... around 100 H/s.
EDIT: Only the second card drops from 1900 to ~1800. The first one starts at 1550 and stays stable.
https://i.imgur.com/wvMzszV.pngBoth cards runs two threads (2016, 1800).
I guess i didn't win the silicon lottery with the first one.
What is your hashrate? Care to share P-States settings?
Gonna try fiddling with the beta overdriveNTool.
