Hi, my previous 6600GT was cooled by a Polarflo TT block and gave pretty good temps (along the lines of 39C load). I've now got my 7800 and finished a couple weeks running on stock cooling to make sure it's running fine, now i want to w/c it to shut it up, it's a non-goer to get ramsinks on with the TT so i'm wondering if it's worth getting something along the lines of the Danger Den NV78. Is an intergrated gpu and ram cooler worth it? and does GDDR3 ram even need cooling? i've heard that it isn't really neccesary.