Question : Problem: power supply compatibility

I just upgraded my psu to coolermaster m850, however the pc wont start at all and the red light at the rear of the unit stays on even when the power switch on the pc is pressed. Is this psu compatible with a gigabyte p35c-dsr3 motherboard, i am hoping someone has that setup.

The connections are all correct and when i put in my old psu it starts perfectly.

Answer : Problem: power supply compatibility

I see nothing in the specs for either device that would keep them from working together.