Hi,
Try reading this, about undervolting. OP also stated some problems about his 3000 series.
My 4070:
nvmlDeviceSetGpuLockedClocks(device,210,2850)
nvmlDeviceSetGpcClkVfOffset(device,250)
nvmlDeviceSetPowerManagementLimit(device,200000)
Reduced coil whine drastically, better performance, less power draw.
It’s 200 watts stock, but the fixed 2850 mhz creates a more stable experience, because it has more room for power, and the 250 offset makes it so at 2850 mhz it uses voltage as if it was at 2600 mhz.
I found 250 stable for 4070, as more than 300 crashes. The more - the better; so test. It’s a similar experience to msi afterburner on windows.
PS: If I’m not mistaken 3000 nvidia series are prone to overheating because of vram? May this be your issue. Try downclocking vram and see temperatures.
Good luck,