dont bother with water cooling. its too pricey. that board is top notch and your overclcom to 3.13 isnt really pushing your passive cooling to the limits, not on a board like that. its god like
for other peoples benefit my norther bridge was at about 60 before i fitted this
it cooled my norther bridge straight away to 30oC. its very small, about the size of a 2 matchboxes, it shouldnt get in the way even if yove got an 8800gtx. it can be installed in any position to make it fit as it swivels.
its very very very easy to install.
use nail polish remover to remove old thermal paste, or simply your fingernail being careful. best to turn pc on for a bit before remove the northerbridge to soften up the paste.
this product already comes with paste and really good instructions. get 1 off ebay.
it will also increase your overclocking abilities for the fraction of the price of a water block if your notherbridge is the component thats keeping you from doing so.
its friggin awsum this thing and looks good