I have a 1.6 I do believe, and a buddy bought mine after I did and he too has this problem, I returned my first one and 2nd was same.
The FAN is way too loud...
I took my Xbox apart and discovered nothing I could reasonably LUBE and if I disconnected it, the Xbox crashes after about 10 mins, so I see it is needed! BOO!

What's the fan specs I need if trying to replace?
I didn't recognize the 2 pin connector.... Any specific model recommendation and/or links with pics/sales for one would be a great help.
I have a Fry's very close to me as well for part if available.
At this time I have not mod'd or anything, just took the noisy SOB apart, hoping I could easily remedy it...
Once again Billsoft let me down... the damn fan I can hear over the games I am playing, really annoying!
-RX220 virgin post!