A 6670 will be plenty fast for your resolution and system. I would make sure to find one that has GDDR5 instead of DDR3 onboard memory. That will make a fairly significant difference. You could also spring for the GT 440. Check out the link below for more information.http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-2.html
thanks a lot....so finally should i buy gt 440 or radeon 6670?
i have read a lot and it seems that nvidia builds better drivers....so i gt 440 a better deal over 6670??