Installation is very similar to that of the other ISGC and Thermaltake CPU Coolers. The first step is to clean your CPU and apply a thin layer of the provided thermal grease. I used an LGA 775 installation so I’ll be using the two smaller brackets for mounting the ISGC-300. Each bracket has two holes and two screw threads attached to them. You’ll need to attach the black rubber washers to the bottom of these screw threads so that there is no metal contact between the brackets and motherboard. Then just simply attach the two brackets to the bottom of the cooler.
You’ll then want to align the ISGC-300 so that it’s vertical and the fan is on the right side; this way the airflow will blow out the rear of the case. Then flip the motherboard over, attach the four plastic washers and four nuts to secure it to the motherboard.
For my installation it was a pretty tight fit to the top of the case, since my motherboard is found near the top of my case, rather than the bottom. Luckily it didn’t interfere with the fans at the top of my case.
Surprisingly the ISGC-300 didn’t take up that much total room inside of the case. It was pretty tall, yet narrow so it allowed you to attach the motherboard and cables quickly and easily.