I'm having stuttering issues in all games after I update to F8 version. Before (in F7) games run perfectly @60FPS but now have frame drops of 30FPS. Sometimes for a seconds works fine (60FPS) but with no reason it drops to 30, 50, no matter if you are in the lowest graphics setup...

I have a backup copy of the old F7 (.bin) but downgrade is not allowed using Qflash or EFIFlash because is outdated...
I don't know if it could be related, but in the F7 version the GPU turn off right when the system shut down but in the F8 stays turned on at least 1 second when the other components are off.

I tried CTRL+F10 to swap the backup BIOS to Main BIOS and I'm still in F8. So I think that the backup BIOS also had the F8 version... Now I think that my only chance is to downgrade, but I don't know how, cause' EfiFlash and @BIOS doesn't allow me to downgrade.

My PC specs:
Proccesor: Intel i5 4670k @Stock
Mobo: Gigabyte GA-Z87-HD3 Rev 1.0 F8
GPU: Sapphire Radeon R9 280x Toxic @Stock
RAM: 4x2 G. Skill Ares DDR3 1600 PC3-12800 CL9
PSU: Nox Urano VX 750W PFC

PS: Sorry about my english

Thank you so much, I hope you can help me...