Sorry about the titles, but this problems is starting to get me very angry! I had 256 MB of DDR 2100, no name brand because I brought it at a computer show. The next computer show my friend brought me at 512 MB DDR 2100 (Because I couldn't go, also no name, however labeled differently from the 256) However I got a surprise when I put it in. These are the possible outcomes I would get after physically fiddling around the two RAMS. (1) At startup It would give me a really weird number, or ignore one of the pieces of ram. For instance, 256mb, 512mb, or even sometimes a correct number (768mb) (B) [This happend everytime] When Windows would load it would say the Ntfs.sys is f*cked (But it isn't because I take on of the pieces of RAM out, and it loads fine) I can't figure out what is wrong!!!! HELP!!! BTW: I got a K7S5A motherboard.