I noticed temperatures were reaching near 90 degrees Celsius while running furmark for 20 minutes. So I decided to open it, clean it, and put some Arctic Silver 5 thermal paste. This dropped the temperatures to 80 while running furmark and while gaming, it is usually in the 60-70 degree range. See the pictures below for how it looks inside. All I had to do was remove the 4 screws on the bottom and the whole heatsink came off easily. I then used isopropyl alcohol and Q-tips to clean it.