Get a 2*1Gb kit of 6400 HZ on a P5B deluxe. No overclocking

During the first install, the system had boot with all bios settings to auto.

After 3 weeks, the system give me a BSOD and the only for me to reboot is to use another memory module and put Vddr to 2.1v. 3 days later, need to put vddr to 2.25v to be able to boot. Is it a normal behaviour or i miss something ?

4-4-4-12-4-42-9-11-7-13, vddr 2.25, e6600 266Mhz, 400Mhz for memory all other settings to default.

I just changed USB legacy to disable.

My system runs fine with a no name memory and when i'm able to boot with my gskill kit, i can run memtest for windows 600% without an error.

PS: No boot is no beep, screen black, fans on. If i remove the memory modules, the motherboard beeps.