Power Supply will not power on and boot computer

[voodoochild16]

PC Power & Cooling is the model of my brand new 910w PSU

Alright, here are my specifications:

Gigabyte 870A-UD3 Motherboard
16GB's Kingston RAM
nVidia GTX 260
Phenom X6 1100T
160GB HDD
1TB secondary for media

PC Power And Cooling 910W PSU

I have this power supply I just purchased: http://www.directcanada.com/products...%20&%20COOLING

It does not work with my build, and since my motherboard doesnt have a green led light showing if it's getting power, i have my speakers turned on and with them plugged into the board, i hear a light "thud" every 3 seconds. I had a ASUS M4N75TD which had a green light on the board which would flash every three seconds aswell, maybe a similar sign there?. Well the asus board didn't work no matter what, so i sent it back.

I also have a Antec TP 750W Blue, which doesn't work this my Gigabyte 87A-UD3 motherboard, and it does the same thing with my speakers plugged in. I know I have my connections right, I am currently writing this thread post with this build, running off of a POS Ultra LSP 650W (ULT-LSP650P), which has no problems running this computer, but I want more power, but I can't run the PC Power & Cooling 910w so I'm stuck with the Ultra...

Does anyone know what could possibly be the problem?. I tried to explain everything in deep detail, let me know what you guy's think and thanks in advance for any suggestions.

 

[theAnimal]

Why do you want more power? You could easily run on a quality 450W+.

As far as the PSU problem, is the PSU fan spinning? You can also try the following to see if the PSU is working: http://forum.corsair.com/v3/showthread.php?t=63991

 

[voodoochild16]

Why do you want more power? You could easily run on a quality 450W+.

As far as the PSU problem, is the PSU fan spinning? You can also try the following to see if the PSU is working: http://forum.corsair.com/v3/showthread.php?t=63991

Well I wasn't sure, but if you say it's good enough to have a 650w, then ill stick with that for now, meanwhile i have a 910w psu sitting in my closet. I want to figure out why it's not working, or if it's actually an incompatibility problem, which i doubt it... everything is standard atx. It just pisses me off. It's too late to bring it back, i ran outta time to test it.