Built new desktop today help please!

I just built a new pc and when I turn it on I get no display what so ever... I've tried it on two different monitors, I don't know what to do...

I have:

- Gigabyte GA-990FXA-UD3 MB
- G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600
- AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz 6 x 512KB L2 Cache 6MB L3
- EVGA 01G-P3-1561-AR GeForce GTX 560 Ti FPB (Fermi) 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card
-24x HP SATA DVD/CD drive
-650W PS Corsair

Any help would be apperciated... I'm so fustrated... Thank you.
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  1. Can you provide some more information? Does it turn on (ie. lights, fans, post beep if you have a speaker)?

    Check that all the components are properly seated (RAM, GPU, etc.) Check all the PSU connections, especially to the video card. Try the other video output on the GPU. Try a different GPU, if you have one laying around.

    If all else fails, pull out everything and build it on a non-conductive surface. If that fails, you may have a bad component, but without extras to test with some times it can be difficult to diagnose.

    First, please provide more information: what have you tried so far?
  2. Presuming its starting up, posting, the next steo is to try another video card; any video card you know works.

    Any beeps on startup?
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