After some digging the problem has been found and solved, but I guess I should give the full story.
For a few days before the problem began, I would on occasion smell something like burning plastic around my computer. Of course I opened it up but I couldn't find the source of the smell so I assumed it was okay (mistake 1). Then, while playing enderal, my computer crashed, so I immediately assumed it was a problem with the unstable, slightly buggy mod (mistake 2). After finding nothing wrong with my graphics drivers, I tried other games and they too crashed, so I worried that the burning I had smelled was something on my GPU (mistake 3).
Turns out the burning smell was only one of the wires connecting my GPU to my PSU melting (I assume the connection was loose after I rewired my PC a few weeks ago and the spark melted the rubber). This meant that while the 'power' indicator on my GPU was lit green, whenever it asked to draw on extra power (it does so for more taxing things like games), it wouldn't receive any and would crash. A slight rewiring of my PC fixed the issue. Thanks Tilliboy for your help