I'm not sure what they mean by this? 3 x DDR DIMM PC3200/2700/2100 DDR400/333/266 non ECC SDRAM Do they mean that you can't use ECC at all or just non ECC SDRAM. AHHHHHHHHHHHHHHH!!!!! I feel so stupid. I have 768 mb DDR ECC PC2100 MEM and now i'm not sure if I can use it with the new Mobo I just bought. BTW it's an ASUS A7V8X-X and the CPU is a AMD ATHLON XP 2600/333 T-bred. Please help FED-EX will be here with my board in about 6 hours. :doh