system somentimes feel laggy on opencore catalina at "gt 730 ddr5 and i5 3570" without "K"

i have a normal i5 3570 with hd 2500 and a gt 730 conected to my monitor, the mac os boot normally but the system feels lag when i backspace texts and other animations, have a way to solve this?.

running VDADecoderChecker don't have success.