Hey guys, I've been trying to build my own computer but I've hit some trouble. I ordered all the parts and foolishly tried to install a AGP video card with a motherboard that only had PCI Express slots. I bought a new compatible video card but now my computer keeps randomly shutting off. Sometimes it will shut off during startup while other times it will run for like 20-25 minutes and then shut off. I dont think its a heating problem because I have three fans built in the casing along with a pci slot fan and heatsink. Ive tried monitoring the temperature and sometimes it will turn off only when the computer is 35 degress Celcius or so. I was thinking maybe I shorted out my motherboard when i tried installing the AGP card but the computer does stay on sometimes for an extended period of time, so is that still a possibility? The next thing I was gonna try and do is unconnect everything from the power supply just in case i connected something wrong when i put in the new graphics card, but do you guys have any other suggestions?