I have an AMD Athlon II x2 245 Dual-Core 2.9 GHz (can oc it) processor and a nVidia GeForce Gtx 470, and 4 gigs of ddr3 ram.I want to know if my cpu is the problem or if it's the gpu, so i conducted a test and ran ac4 on low to medium and got 24 fps. Then i got it up to high and got from 22 to 24. In the task manager the cpu was never under 90% load while playing while my gpu never exceeded 86C (don't know how to check the load on my gpu) so if it is from my cpu, i will need some suggestion's for a new one and if its from the gpu i will have to live with it.