Me and my system designers built this PC as one of the prototypes for the Phoenix(R) Randalletech(R) Signature Series line of PCs. (I am the owner of Randalletech Luxury Computer Co. (R))
After taking pictures of the system, testing performance, and performing quality testing, I decided to use it as my primary home PC.
Regretfully, we cannot build this exact system again. This is because of our conception of our porducts as inducidual "works of art" that should never be duplicated.
Sorry for the rambling, now back to the x850XT PE...
think of it as an older car. Lots of them rev for a short period of time while they warm up, yours just go max speed while they start by default and wait for windows to kick in and detects the fan speed and slows it down. Thats just my guess.