My CPU runs pretty cool (under 40C while gaming), but my GPUs have started overheating and shutting off video output. Is there a way to watercool just my video cards, or do I need to do the whole system, which isn't quite necessary and I can't afford it. I was hoping somebody knew of some kits or something that I could use for my GPUs.
Here is a idea that may help if it's a overheating issue.
Try placing your videocards in the 1st and 3rd PCI-E slots. When you have them in 1&2, it's hard for the first card to suck in and cool air, and it will get hotter due to this.
I understand that only the first 2 slots are 16x slots, and the third is a 8x slot, but I just encountered and article this morning that show the performance difference between these choices when in SLI.
For the record, you can watercool only what you want...you could watercool your soundcard if you really wanted to and could find a block. But, something no one would ever suggest doing.
With that being said, your issue (as you discovered) was airflow within your case. This is one of the first things that needs to be addressed and sorted out in order to determine how you setup and design a watercooling loop anyway.