New Memory (Not much of a budget)

Welll... i dont have a budget for the memory so thats good, so whats the best i can get, im assuming it is Samsung TCCD? and would i notice a difference in performance from 1gig to 2gig that would be worth the money? i doubt this but just curious? plz help ekkk thanks
A few specs...
AMD FX-55
BFG 6800 Ultra (maybe 2x)
DFI Nforce4 SLI
i dont thinki would notice a much boost in performance other than a bit faster loading maybe, but then again i know nothing

This is the cheapest tccd you will find.
http://www2.newegg.com/Product/Product.asp?Item=0-N82E16820144332
There is no 2x1024 tccd. I would not advise you to run 4x512 as performance would suffer.

Just saw another thread saying this stuff may BH5 not tccd.
http://www.xtremesystems.org/forums/showthread.php?t=56460