I made the mistake of buying 2 GB of Ram when I built this system instead of 3-4 which would be ideal. I'm am pretty broke right now so I'm looking for the cheapest upgrade possible. If I can find 2 x 512MB sticks of A-Data that match the specs of my 1 GB sticks would that be the best thing to go with? Also, will running 3 GB like that result in a noticeable performance loss. This ram is pretty speedy right now I run it at 4-4-4-11 w/Trd of 7.