Tis it better to use ECC DDR or non ECC DDR in my rig. The machine will have an Abit KG7 Raid mobo - 1.2 Athlon. 4 strips of 256 DDR PC 2100. Registered? Unbufferd? Non-parity? CL2? CL2.5? It's all greek to me. 3 20 gig ATA/100 drives. Matrox dual head graphics board. SO what kinda ram to use? And what is the diffence between ECC and Non ECC ddr?