Corsair CX500 500w not working

So I just got me new PSU and my GTX 760. I started setting everything up, and decided to test the PSU, I plug everything in and the fan spins but only for a second and then stopped. I tried everything and it sill does not work, I used my old 400w psu and everything booted.

Could it be that my motherboard does not support the ATX 12 v2.3?
I believe my motherboard is an ATX 12 v 1.
Or just faulty PSU?
I cant use my GTX 760 on my old PSU because it does not support the pciE plugs. Hopefully sombody can help me. What could be the problem?

Motherboard ASRock H61m-dgs
Processor i5-2300 @2.8ghz
Memory 8gb
Video Card # 1 gtx 650 ti superclocked
Hard Drive # 1 200gb
Optical Drive # 1 none
Power Supply Corsair CX500 500w. and the old one
Monitor benQ
Operating System Windows 7 64bit


Posts: 10,612   +463
Have you attached your old PSU since trying the new one? This behavior can occur if you have a new build and didn't use the motherboard offsets (or left one in from an old board that doesn't match your new one and it is causing a short). Edit - Re-read the OP

Can you boot with the new PSU without the GTX 650?


Posts: 2,151   +588
Also your GPU should have some molex adapaters, if you old PSU does not have the PCIE plugs grab some of the molex adapters and hook it up to the 400watt to see if the machine works. If not then its likely the GPU, if so the PSU maybe bad which happens.