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I bought a new laptop and installed windows 8 on a SSD. Since that time I have noticed that my laptop fan does not turn on any more, I pulled open some sensor software (hwmonitor, coretemp) and its showing my processor at 100 degrees Celsius. I clearly remember before changing the HDD for a SSD that the fan was not noisy but would actually be audible. my system cooling policy is set to active, yet the fan doesn't tun on even when you could boil water on my cpu die. HWMonitor reports another sensor I believe to be a motherboard sensor at around 30-40 degrees, I believe windows is using this sensor to control the fan and not my cpu die. In addition to this my fan turns on for a split second as the laptop turns off, I believe this to be windows giving up fan control and the bios taking over.

Does anybody have any idea how windows controls fan speed?

Does anybody know the driver responsible for fan speed control so I can disable it to let the bios take over?

Addition information:
Toshiba satellite s855d
amd a10-4600m
TOSHIBA.CA is down so I cant even look for system utilities
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD 1090T asus ma489td pro/usb3 560ti gskill 12 gb 
Hard DriveOptical DriveOSMonitor
vertex 2 80gb (25nm nand I think) generic spare I found around the house windows 7 64 bit dell 23" lcd 
PowerCaseMouse
ocz modxstream pro 700watt xclio blackhawk color microsoft wireless mouse 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD 1090T asus ma489td pro/usb3 560ti gskill 12 gb 
Hard DriveOptical DriveOSMonitor
vertex 2 80gb (25nm nand I think) generic spare I found around the house windows 7 64 bit dell 23" lcd 
PowerCaseMouse
ocz modxstream pro 700watt xclio blackhawk color microsoft wireless mouse 
  hide details  
Reply