i think the TS has 2 kit of 1gb , each 2 x512mb of OCZ gold so total of 4 x 512mb

then 1 of the 1gb kit (2x512mb) sent for RMA, but come back is 2gb kit (2x1gb)

so now back from RMA, he has 2x512mb and 2 x 1gb kit .......so total 3gb.........

btw if the rams can run at the same timing at ur desired speed not much problem overclocking.........even with different chipset

but seriouly 1gb upgrade to 2 gb a lot of difference, but later not that muhc unless the game is CPU and memory intensive...... i did find my supreme commander to be a bit smoother at massive amount of unit scenario when running on 4gb then 2gb or rams, (but sadly i'm still on winXP, so 3gb is the useful capacity only)

xp 64bits only fix that problem.............but no point using that now too haha.........

better wait for vista 64bits to stable then only go for it...........