Here are some commonly used methods to cool an Xbox down:
- Boosting the stock fan speed
The stock fan speed is controlled by the system. Although the stock fan is a 12v 70mm fan, the system usually runs it at about 20% of capacity. This can be changed by editing the bios, by adjusting settings in the dashboard (only alternate dashboards like UnleashX and apps like XBMC do this), or the fan can be rewired directly to a 12v source for full speed.
Hacking the harddrive tray
You can provide more cooling to the harddrive by hacking the plastic at the rear of the harddrive tray. This is not a major improvement, but it can cool down a high speed higher capacity drive if you have one installed.
Here is a photo of a hacked hard drive tray:
- Installing an aftermarket fan
The stock fan is a 12v 70mm fan, and it can be replaced with a 70mm or 80mm aftermarket fan. A 70m fan is difficult to find, so most people modify their Xbox to fit an 80mm fan instead. Also, 80mm fans commonly come with leds or cathodes, making those a popular choice despite the need to hack some plastic off the drive trays and the case lid. Tutorial for installing an 80mm aftermarket fan∞
- Installing sidefans It is possible to install additional fans onto the sides of the Xbox case. This does provide a slight improvement for the internal temperatures, but is completely unneccesary and is more of a visual modification than a cooling boost. The example photos shown below were simply bolted onto the case lid, and hardwired to the 12v harddrive powerline (yellow wire on the molex plug).
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- Watercooling
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