There's a sale going on, and I have no idea what the extensions of a Video Card mean. I understand that a Raedon HD 6870 is pretty damn good, but there are a bunch of specifications that I have no idea about, and they cause the price range to change by $50~ or so.
Anyways, I was considering getting the Raedon HD 6870, but the EVGA GeForce GTX 560 was better and also cheaper, so I was thinking of going for that. The problem is, some are $200, and some are $140. I honestly have no idea what the cons of having the cheaper one is, so I need your help.