So I was planning to get an aftermarket cooler for my HD7870XT. I don't plan to upgrade anytime soon so I thought I'd spend some money on a cooler since the stock one is rather loud and the card gets hot in some games (NFS MW 2012 @80 degrees celsius). I was looking at Arctic Accelero Xtreme III and IV coolers. I saw that IV has a backplate, about 25mm high and I was wondering would it interfere with the heatsink on the northbridge, or do I need to install the backplate at all. Thanks in advance.