to be honest I dont really know(I got this computer a couple of years ago from my brother).my graphics card is I think a NVIDIA Geforce GTX 560
and I don't know what my CPU is but I heard from my brother that its crap.
I can run A heavily scripted modded Skyrim fine at 60 fps on high settings though and Act one had little to no lag in it.only after arriving in Reapers Coast did it go to about 5-10 frames a second with long stuttering freezers ranging from anywhere to 5secs to 5mins long to unfreeze.