I have read and searched the forums and some tutorials but am still struggling with a fan issue. Here's the background:
Got a v1.6 softmodded Xbox (Splinter save game exploit), I have UnleashX when powered on by tray eject and straight into XBMC (Dec 07 build) when normal power button is used.
I have installed a new 80mm 12v fan (http://www.quietpc.com/gb-en-gbp/products/80mmfans/coolink_80_r) and initially connected it to original fan socket. The XBOX was very quiet and with the temp' settings set to 50c in XBMC all was good (full control over fan speed in settings etc). Then I found out that once out of XBMC playing on a emu (SNES) the xbox shut down (overheating) as the fan speed reduced it's speed to (as I have now found out on XBMC forum) 20% (I'm lead to believe) as specified in XBOX BIOS (which I have no access to change as box is softmodded).
So I tried connecting fan to HDD 12v supply (using supplied inline power connector) and now the fan runs a lot faster (and about as noisy as original stock fan!!) but I have lost control in XBMC to use temp' monitoring or fan control. I seem to be at catch 22 time.
Has someone done the same as above and managed to get a quiet and cool Xbox but purely softmodded.
By the way the fan is set to pull air in (some tutorials recommend this and others mention it makes no difference).
I have also noted some comments about games controlling fan speed so could it be that in my initial install if I had played an XBOX game rather than EMU I wouldn't have got overheating issues?