When I changed my stock Intel CPU cooler to a CoolMaster Hyper 212 my CPU temperature dropped about 10 degrees C, and I could run OCCT CPU tests without OCCT complaining the CPU was getting too hot. My X58 North Bridge temperature, however, went up about 10 degrees C, and the X58 chip got hotter than the CPU under OCCT. While the X58 probably can tolerate the heat, it annoyed me. Looking at my case, air flows in via the rear fan, through the CPU cooler, then out via the front fan (not visible). There was a "dead zone" beneath the video card and above the CPU cooler with little airflow right where the X58 sits with that silly Gigabyte decorative cover over the heat sink fins. Some builders just remove that cover, but as folks here know, sometime you might want to RMA your mobo, so I didn't want to do that. The solution was to add an $8 AOC FC-2000 PCI Slot Case Cooler in the unused slot beneath the video card. The fan sucks air in out of what was previously a dead airflow area and exhausts it out the back. It's fairly quiet and makes a swooshing sound rather than the typical sound of my case fans. My X58 temperature is now actually lower than when I was running the Intel stock cooler which probably blew some air onto the X58 heat sink. The green arrows show the airflow direction.