[2020] [Performance]DX11=Bad performance DX12= Good performance but crashes every 1-2 hours.

DX11 crashes noticeably less often, but delivers much worse and less consistent performance. DX12 gives me very good and consistent performance but crashes very often, on a bad day 4-5 times on a good day 1-2 times. my gaming sessions are usually 3-4 hours. Are there any work-arounds to improve DX11 performance? or Decrease the crash frequency of DX12? Thanks in advance!

My specs: i7-8700K, 1080Ti, 16gbX2@3600
2nd PC: i9-9960X, 1080Ti, 32gbX4@3400 (Same situation as stated above)