Hello and thanks in advance for any help! I've got a GT683, long time ago I flashed with the unlocked bios posted here. Then after months I decided to upgrade the graphic card to a 675m (from 570m), flashed the vbios with the MSi one and seems to be working, but when I try to play any game the computer stutter GPU and CPU. Tried turning off HyperThreading and SpeedStep, turning on again, throttlestop and loads of possible fixes without any success. To be honest, one time I turned off the Hyperthreathing it worked for a day, but then I updated the drivers and the stutter appeared again. Tried rolling back drivers and all of above again, with no success. Should I re-flash the bios or something like that? Would appreciate any little help. Thank you all again.