The GTX 650 is in its element with 1gb of DDR5 ram. It's not powerful enough to use more than that, and using DDR3 ram only slows it down even if it's a lot of DDR3.
well cuz this is used market, the 4gb is cheaper than 1gb, i thought i can call the seller and testi it out together, if it is all good i will give him money. what do you say?