If I plug my laptop to an external screen, optimus disables, thus bypassing the integrated intel hd, and getting better GPU performance.
Thats normal. What I dont get, is that CPU performance also improves.
Cinebench R23 : ~8300
Cinebench R23 (optimus off) : ~8500 (got up to ~8700 with further undervolt, but 8500 score was with the same settings)
3dmark Time spy CPU score: 8500
3dmark Time spy CPU score (optimus off): 8700 (CPU test is just 1fps higher)
I get 3dmark cpu score might benefit from the optimus off, because it uses the GPU, but why Cinebench score increases too? I tested like 5 times each bench with opitmus on and off.
Laptop is a MSI GL65 10750h + 2070 super