The Antec Kuhler 620 is for processors not video cards, that being said, if you can afford to custom water cool your video card, you can afford a set of heatsinks for your VRAM. With the VRAM heatsinks, you use a thermal paste that's also an adhesive so that they stick. There are also air coolers out there that do a good job of keeping the video card cool, sometimes they come with everything, sometimes not, just gotta shop around. Personally, I can't see water cooling a video card, they're engineered to run hot, and that 100$ for the cooler can buy you a better card in most cases that you don't need to overclock to get the same results, only when you're talking absolute high end overclocking does watercooling come into it's own, or fun or bragging rights. Nothing against WC, I would if I could afford it, but it's not a necessity.