The case fans in my comp have started running at full speed when I start the computer up. It doesn't do this everytime, but it is pretty regular. Any ideas on what is causing this? As soon as Windows starts to boot, they calm down, but it can last around 10 - 15 seconds.
I am running Windows 8.1 Pro with Media Centre (fully updated) on a custom built PC.
Motherboard - ASUS PH877-M
CPU - Intel Core i5-3570K CPU (3.4GHz)
RAM - 2 x 4GB Corsair Vengence
Graphics - nVidia GeForce GTS 450
Power Supply - CIT 700UB (700W)
Hard Drives - 2 x WD 1TB + 1 x WD 300GB
This has been set up this way for about 9-12 months, and this issue has only started in the past month.
Any thoughts would be appreciated? Any other info needed - let me know.