This increases the idle speed of the fan by approximately 20%, but also allows the console to still increase / decrease the fan speed to keep the console cool under the hardest game play scenarios. 

The noise level of the fan after the upgrade is totally acceptable so its doesn't affect your viewing pleasure whilst watching a movie.

This is a must for heavy users of games like Fifa, etc....

This is also a good addition to the BLOD reflow repair as this will ensure that the console is kept alot cooler than standard.