It would completely disappear from windows and the bios. (117 gig actually available) Guessing that indexing was pushing an almost maxed SSD to the limits and causing it to drop off line. I think I solved the problem by making sure indexing was turned off, a few useless programs deleted from the drive so as to move it further back from the limit of 120 gig. Black screen with the cute little one line note that the operating system and boot drive was missing. I have had my OCZ SSD 'C' drive drop off line a couple of times in the last few days. To give speccy the benefit of the doubt I suspect that when temps are really low the sensors just pick a spot and announce that as the prevailing temperature. I suspect that were the bios not set to run the fans slow when the temp sensors are not activated the fans would be off (except for the CPU heatsink fan which is running pretty slowly also).

That's my best guess too that it is reading the voltage being applied to the fans - the system runs so 'cold' with the only heat sources being the vid card and the CPU that the motherboard really throttles down the fans. the DVD Optical drive (sounds like it is running at the desired speed), the external backup drive connected to ESATA and the two SSD's. If Speccy is reading the voltages supplied to fan control - 8.866 volts may be OK as fans are running well below their rated speeds - but if the motherboard power control system is off kilter the board may not be applying needed voltages to the basic system operation i.e. Intel desktop control center reads the 12 volt line in spec. Do I have a problem? Bios reads the 12 volt line in spec. However, Speccy reads motherboard voltages as within spec except the 12 volt line reads 8.866 volts. All of these fans are running slowly but I expect they should because the motherboard temperature as measured by a Piriform monitoring program called Speccy is 11 degrees centigrade. There are 5 fans operating in the system off the motherboard.

One external disc hard drive and only SSD's internally with an DVD optical drive.

Speccy power supply volt