Yesterday I got off from work and tried to get on the computer and I got the postcode 26 and the computer would shut off. I moved the gpu to the lower pci slot and it would start up and actually would post but would shut off after a few minutes. Now the thing won't even start unless I completely unplug it and plug it back in or use the clear cmos and jumper. Now Im only getting the C1 and then it will shut off and won't do nothing else. I replaced the psu thinking there wasn't enough power to power the computer. So my question is do you think its the motherboard or the graphics card.