Hey guys this is my first post yesterday i bought my first imac 800hz 512mb 60gb for 200 bucks yesterday so i brought it home put my 160 gb loaded up OSX now i wanna upgrade my memory i have alway used pc's so i did some researching and from what i understand mac doesn't use ECC memory correct?? I want to just put 1x 1GB stick of pc 133 but i cannot find the non-ecc and i accidently purchased ECC ram on eBay can someone give me the lowdown with my first mac will it work if i just put the one stick off 1GB PC 133 ECC ?