Did you remove that?
To me it sounds power related. As power supplies and machines age you will enounter this. Fix? Varies but often I have to replace the PSU with a nice SINGLE RAIL MODEL that is 50 to 100 Watts more.
So recently I have been experiencing some crashes while playing games on my computer. The problem is it is not due to overheating, and it happenes only when I play specific games. Lately the most frequent (about every 30 minutes) crash is inside the game "Dota 2". I have been playing this game for long with the best graphics, but after i moved my computer onto my desk and added an rgb usb led strip it started crashing, only with high and ultra settings. It happened in other games but its not a big problem because it happenes so rarely.
my specifics:
CPU: intel core i5-4460.
RAM: 16gb.
GPU: Nvidia gtx 960.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic