Well let see, humm :book: the frequency setting should do the trick, make sure you use driver cleaner pro to clean out old nvidia entries, also my nvidia settings are always set to image settings: high quality, also in your advance settings, Negative LOD bias set it to clamp instead of allow. Make sure your AGP voltage in your bios is set to default. Lastly you can also check if your motherboard has the latest bios from Gigabyte. That’s about it I guess…
Hope this helps