Fans intermittently run @ full speed - problem solved - wireless card was culprit

Question

I hope this helps someone in the future with this odd problem, that I see is rare but not unknown.
I have a P7-1222 which from new, would on about 1 in 10 powerups (i.e., random) have both CPU and case fans running full speed (several thousand RPM) making the machine very loud.  They would reset to more normal speeds of ~ 1000 on a cold or hot reset.
TMPIN1 at time this occurred at powerup would, via HWMONITOR or SIW, show 99C (which was impossible), making the fans race.
Two motherboard replacements, PS substitution, CPU swap etc. did nothing.   The intermittent problem persisted.
Now the culprit has been identified.  I replaced the wireless LAN/Bluetooth combo PCI mini card with an identical unit from eBay (in this machine, an HP COMPAQ 615939-001 652279-001 WIRELESS N BLUETOOTH COMBO WLAN MINICARD).  The problem of intermittent fan racing is now gone.
The wireless card in the machine seems to have been the culprit, perhaps occasionally sending a noise spike on powerup as it initialized onto the bus, thus affecting the Fintek F71858 LPCIO  TMPIN1 reading  and making it 99C, causing fans to race via BIOS thinking the machine was burning up!
Doing some investigating, I had found the following in the Data Sheet for the Fintek F71858 LPCIO chip ("Hardware KBC with ACPI, Temp. and Fan Control") used on numerous HP/Pegatron motherboards, including the Carmel/Carmel2 and other HP boards that use the same basic circuit layout:
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8. PCB Layout Guide
F71858 adopts Current Mode measure method to do temperature detected. The measure data will not be affected by different process of CPU due to use current mode technology. This technology measures mini-voltage from the remote sensor so a good PCB layout must be cared about noise minimizing. The noises often come from circuit trace which is a track from remote sensor (CPU side) to detect circuit input (F71858 side). The signal on this track will be inducted mini-noises when it passes through a high electromagnetic area. Those effects will result in the mini-noises and show in the detected side. It will be reported a wrong data which you want to measure. Please pay attention and follow up the check list below in order to get an actual and real temperature inside the chip.
... Place the F71858 as close as practical to the remote sensor diode. In noisy environments, such as a computer main-board, the distance can be 4 to 8 inches. (typ). This length can be increased if the worst noise sources are avoided.
Noise sources generally include clock generators, CRTs, memory buses and PCI/ISA bus etc
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And defective wireless cards can be a noise source too, it seems.

Answer 1

The issue was what I expected.  I picked a new reader last night and everything works fine.   My old card reader just didn't work with the new card.