From since I first built the pc, I've been having random blue screens, sometimes once a day and sometimes even 20. They really make me mad. I already posted something on this forum some months ago about this problem. They analysed my dump files, and told me that the problem was coming from the usb modem drivers. I updated all my hardware drivers to the latest stable drivers, to no avail. The only solution I found to this problem was to use only 1 module of ram. It runs perferctly. If I use the 2 modules, then problems will strat again. I thought I found that the problem was from the ram, but when testing the with memtest, I found that both modules passed the test for about 10-15 passes. I even tested them on both the slots I use when they are attached both. I think that the problem is still coming from the motherboard as I tested the other hardware. I did a stability test to my graphic card, and it passed. I changed the hard drive and I still had blue screens when using 2 rams. I also updated the bios drivers and formatted the pc every once in a while. Is there any problems that can identify problems coming from the motherboard. The asus support disappointed me. I couldn't even send an email. I have to call them, and since i'm from outside uk, i will be charged internationally, and it will take me ages to explain all this to them. I thought someone might have an idea, because I really don't know what else to do.