ok this is my problem, in driving games im getting slow down problems when in a race, grid Autosport, asseta corsa, drirt rally & project cars.
sample here. please read description on video
https://www.youtube.com/watch?v=1EdxdosWYJA
my spec is
AMD 8 core 8450
16gb 1600 ram
asrock extreme4 970 chip set
gtx 760 2gb
windows 8.1 wmc edition 64bit
7200rpm 2tb hard drive.
all latest drivers & windows updates.
bf4, dayz standalone, arma 3 all fine

pulling hair out.
maybe the motherboard?