My current motherboard has 4x agp. I want to upgrade to the lastest AIW video card for christmas and I was wondering, now that most stuff is 8x, would it make a difference for me in my 4x board? It's an IT7-MAX2 v2 and I have a solid 2.53@ 3.1GHz running on it. Would I have problems with Doom 3 and stuff or would I be all set?