Heat: http://heatware.com/eval.php?id=71276 eBay: http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2&userid=zbtbabyfactory&ftab=AllFeedback I only accept PayPal unless you are local (I live in Dallas,TX). Hey guys! I am selling off my 2 GTX 580s with their Koolance wateblocks. These guys are great overclockers. I flashed the bios to an ASUS bios so I could adjust the voltage for better overclocking. You can use the ASUS SmartDoctor utility to OC the cards now. I was getting stable OCs of about 930Mhz+ (up from 770Mhz), but ymmv. I never tried to OC the RAM. The cards will come with the original heatsink/fan, accessories, and in the original box too. Model number of the cards are 015-P3-1580-AR and 015-P3-1580-TR. I am asking $250 ea shipped. If you live in a different country PM me and I will get you shipping rates.