I just got a gtx 560 for my HTPC. Unfortunately, it butts up against the x-fi I just got (darn pci-e 1x being next to 16x), so it runs very loud and very hot. Water cooling is getting relatively affordable for cpu, is the same true for gpu? I don't need performance that beats high end air cooling, just something that can reroute the heat away from the small enclosed area and do so fairly quietly. IE, if I could just get a radiator located in one of the unused PCI slots or externally.