Intel 6420 HSF problem...

Hey guys,

You have always been of great help and the first place I turn to when I am stumped so here it goes...

Newly built rig, with the following components...

Eagle Tech ET-CAV2-RD-WOP Red 1.0mm Aluminum Aluminum Mid-Tower Multi-Function Viper LCD Display Tool less function chassis ATX Mid Tower Computer Case - Retail
GIGABYTE GA-965P-DS3 (rev. 1.3) LGA 775 Intel P965 Express ATX Intel Motherboard - Retail
XFX PVT73GUGD3 GeForce 7600GT 256MB GDDR3 PCI Express x16 Video Card - Retail
FSP Group (Fortron Source) FX700-GLN ATX12V, V2.2/EPS12V, V2.91, 700W RoHS Quad. SLi Power Supply - Retail
Intel Core 2 Duo E6420 Conroe 2.13GHz LGA 775 Processor Model BX80557E6420 - Retail
Patriot 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model PSD22G800K - Retail
Seagate Barracuda 7200.10 ST3320620AS (Perpendicular Recording Technology) 320GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
Microsoft Wireless Optical Desktop 1000 BV3-00003 Black USB RF - Retail
Hanns·G JC-199DPB Black 19" 8ms DVI LCD Monitor - Retail
LITE-ON 20X DVD±R DVD Burner with LightScribe Black SATA Model LH-20A1L-05 - OEM

Now here is the problem I am having...
If I let the PS sit in BIOS, the fan on the Heatsink will run normally. Once it boots into Windows XP Pro it will intermittently stop and start. I normally would not be worried, except I have not seen this type of behavior from a HSF before. It does not appear to be affecting the temps as they hover at around 38-39C when Idle. Just speed fan and cpu-z running to monitor. The motherboard beeps every time the fan stops and is driving me nuts(currently disconnected to save my sanity.)

Here is what I have done...
Updated all drivers including windows to latest. Updated the BIOS to F11B which adds support for the 6420.

Any Ideas would be greatly appreciated...

Thanks!!!!

I didn't see it in the BIOS, where is it? I looked in the manual and the only reference to smart fan is through the Utility program which I have not installed yet...

Thank you all for the help! I knew as I said before that you guys were the best!