I have been experiencing very similar problems
I have DP55SB motherboard, Core i7-860, Win7 Professional 64 bit, the latest BIOS 5893 (previous version 5531 had the same problems)
Once in a while, my system after power up gets hot. IDDC shows CPU temp 99 deg C, full speed at all fans.
According to: Real Temp 3.60, CPU-Z 1.56, Core Temp 0.99.8 and SpeedFan 4.42 all Core temps run fairly normal 38 to 45 deg C. Clock speed = 3.2 GHZ (multiplier 24).
When I put the system to "Sleep" and then immediately back to "Run" all returns to normal i.e. IDCC shows CPU temp 53 deg C
the issue is just as i describe in the first post. DP55KG, latest bios, 2 * 3pin Fans. Suddenly during normal work like browsing the web or reading email
all fans are at full speed, going to standby and back returns to normal operation. Sometimes the fans are at all speed from poweron.
I would like to solve this behavior otherwise i will go to another brand and return it to the dealer since the board also have major noise on the mic input port.
Hints are welcome.
This is not something we have had other reports on, would one or all of you be will to run the System Information Utility and PM me the reference number?