alright well im not sure what the term bottlenecking is but the other reason for the gtx was that my comp only has one pci-e slot open as i already ripped out my tv tunner just to open slots. I havnt checked the specs on the 5770 but i know i need a small 1 pci-e slot card. Also if I buy the GTX 460 for 215$ cad i get the psu with it for 44$ instead of paying full price.