At 15 minutes ago, chubzilla100 wrote:
That does look pretty sweet, but what's the different fan power switches for?
With my last x-box, I did two switches to change each fan's speed. The way they're plugged into the boarad, their power varies between ~3.3v and 5 or 7v max, depending on how hot the internals are getting, and how fast the motherboard tells them to spin. The more higher the voltage, the faster they spin, giving more cooling through the fan shroud, removing heat from the heat-syncs over the CPU and GPU. The faulty design leads the GPU (graphics processing unit) to get much hotter than it should, melting the factory solder connection, and letting the board warp, moving it out of place. This will lead to the E74, three red light error.
Fixing that is as easy as opening the 360, unplugging the fans, and running the console hot so it melts the solder and floats the GPU chip again. You take off the factory x-clamps under the board first, and get a fix kit, with is basically a few bolts, buts, and spacers that keep the heatsyncs tight, and the board at the correct height from the cage it sits in.
Even a fixed 360 still gets hot, and it can go right back to the E74 in time. Increasing fan voltage makes it a little louder, but can extend the life of your console. The CPU fan is usually good enough, especially since it always has a massive heatsync on it, but the GPU heatsync is tiny and weak, and the fans favor the CPU, due again, to shitty design. I wired the switch so you can choose to do the regular speed if you're watching a movie or listening to last.fm; things that aren't using the GPU nearly as much, and 12v setting for when you're playing a game, and need a little more cooling.
I forgot to mention one detail. I also put yellow LEDs into the bottom of the DVD drive, which you can kind of notice when you see the disk in and spinning, but you can really see them lighting it up when you eject the disk drive.