Re: Weird graphical trash/hard lock. 6600 AGP
Well, this is a doozy. So, despite my cooler CPU temps and better voltages, the problem turned out to be solely with the card. After getting fed up with the card when it froze yet again, I metaphorically ripped it out of the motherboard and gave it an inch by inch inspection. (In actuality I gently removed it and gave it a look see).
To my surprised, the fan/heatsink apparatus was mismounted on the GPU. Only one of the two pins that holds it onto the board was tight. A few attempts to fix with dental floss later =) my roommate dobbed a dot or two of superglue on the post to fix it into the right place.
A few hours later, I'm still running lock free. We'll see what happens.