HisMajesty

If you get a water block for your video cards, most of the blocks only cool the core, how would you cool the memory, just get some RAM sinks,

Theres these
http://www.newegg.com/Product/Produc...82E16835127009

those would cool it all but kinda expensive, and im not sure if they would fit on a 7800GTX, cause i plan on getting SLi of the 2 new 512MB 7800GTX thats the only reason why im asking.

colonel_sanders989

There good at cooling your ram, bad thing is that ram isn't really limited too much by temp. Don't get me wrong, you'll get a few more mhz out of em' but nothing huge without doing voltage mods. Also all those koolance ones are 1/4" ID tubing and that's rediculous! Almost everyone has 3/8 in not 1/2 and reducing down to 1/4 is too much! Best bet would be to just go with core cooling and get ram sinks.
OCZ maked some good ones and so does tweakmonster (although the tweakmonsters are quite expensive).

Some_Idiot2

Expensive??!??! Thats nothing for a GPU block that cools the GPU and RAM. If you realy want a good waterblock that will cool both the GPU and RAM, get this: http://www.dangerdenstore.com/produc...&cat=48&page=1
Those Koolance blocks have really small tubing(1/4"), so they won't perform very well.
edit: As for SLI, get these: http://www.dangerdenstore.com/produc...&cat=67&page=1