Cooler Mater GX 550W

[TheHappyJester]

Hi,

I built my new system over the weekend and ran it for a good few hours with now problems at all.

However over the last couple of days the Cooler Master 550w GX has developed a teething problem, it is nice and quiet during POST and at the Windsor 7 login screen but as soon as I log in the PSU fan ramps up to top speed and stays like it.

I have a Antec 300 with all 5 fans on high so I do not think its a cooling issue.

I spoke with Scan who suggested it may be the temp sensor so have sent me a new one, however I have just installed it and still have the same problem..

Any ideas?

Thanks, Will.

[TheHappyJester]

Spec..

ANTEC THREE HUNDRED CASE
500GB SSUNG HD502HJ F3 SATA HD
MS Win 7 Home Prem 64bit OEM
AMD PHENOM2 X6 1090T AM3 125w
GByte GA-880GA-UD3H MoBo AM3
2GB XFX HD6950 DDR5 PCI-E
8GB 2x4G CMZ8GX3M2A1600C9 XMP
50W CM EXTREME GX 80+ PSU