I will try to explain my self this mess :-)
I used to have 2x2GB Corsair PC2-8500 and 2x1GB OCZ RAM memories PC2-8500 CAS Latency 5.5.5.15 in my system. The timing was set by me manually to 5.5.5.15 and voltage to 2.1 because the SLI-Ready feature didn't work but sometimes a blue screen...