OK I bought this for my Dual 1.25 G4 tower, but I guess these Macs only do 512's and lower. Now I read somewhere that the new iMacs with DDR will take 1 GB DIMMS! I don't know if its true but if you do some research and it turns out to be, this may be the DIMM for you. It should also work in G5's no problem. Except that you need another one from somewhere else. Also it should work in all those PC's too that are out there. It's CS is 2.5. Its 6 layer I believe, though I have no idea what that means. It came with a heat sink so I already slipped it on there. I'll sell for $130 and I'll ship for free in the Lower 48 states. I really need to sell this thing because I need to pay for the two 512's I already bought to replace it. Contact me
ebay@johnmasone.com
:-) Thanks