Hi,
Have you tried just assembling the main components:
CPU
RAM - 1 stick
GPU
Read this post up to the point where just the basic components are assembled:
http://forum.giga-byte.co.uk/index.php/topic,5704.0.htmlorPerhaps a CMOS clearance:
by Dark Mantis
Remove the power cable from the mains supply and then press the power switch on the case for a few seconds just to drain any residual energy in the PSU capacitors.
Once done remove the motherboard battery for at least one hour before replacing it.
Next plug back into the mains supply and boot.
You will now need to enter the BIOS by pressing DEL and load Optimised BIOS Defaults.
Make any other changes to the BIOS settings to suit your self like disabling the floppy drive, disabling the full screen logo and making the HDD the primary boot device and then press F10 to save and exit.
As you cannot establish as of yet whether the components are good
perhaps buying some more compatible memory or a get your psu tested might be worth considering.
Ensure that everything is connected properly.....safety first when it concerned with electricity.
Teknology9