Turns out it was the HDD. It's dying a somewhat slow, painful death. I've since put in a 250GB SSD and my 660Ti reads as working fine in the device manager. Currently when I boot up to the old drive half the software won't even run. I might check it out for some stuff to save but I think I already got most of it when I moved over to my current system. It's actually the first drive I've had thats actually failed on me and I've been using PC's since the early 386 days. Not to shabby if you ask me.