Hey Guys , I got a new 1gb DDR 400 Ram for my PC, I already have a 1gb DDR400 ram so now i have 2 X 1Gig of Ram Now the problem is that My windows Doesnt load, it goes up till the welcome screen and then my system restarts on its own, thinking that my new ram might be faulty i put the new ram alone and rebooted my PC, it works like a charm .. so when i install both the RAm ,it doest boot. then i changed Memory frequency on my BIOS setting, default was Auto, i changed it to DDR 333, it didnt work and then again i came down to DDR 266, now it works fine.. now i m a little confused, my RAM is DDR 400 , am i running my PC at a lower Speed.. ?? or is it something to do with the dual channel thingy? INtel 865 GV chipset Win XPsp3 P4 2.66 Geforce 6200 2 X 1gb ram DDR400 thank u all for ur replies..