Can anyone help please. I have just purchased 4 1Gb Kingston DDR2 667Mhz PC2-5300 CL5 memory sims for my mainboard an ASUS P5N32-E SLI. However i can only get the board to see 2 of the sims instead of 4. When i insert all 4 sims the bios(Revision 1404) dosent even post, if i insert 3 of the sims the bios begins to post and then fails. 2 sims works fine(2Gb Duel Channel mode). The memory is on the ASUS QVL list so i cant seem to figure out why the board cant see all 4 sims can anyone help as ASUS hasent even got back to me? I know Vista 32 can only see 3.5Gb but if i can get the bios and board to work i can install a 64bit os.