My guess is you didn't benchtest before assembling everything in the case. If I'm correct, that was a very costly mistake. It may be too late, but I suggest you take all your hardware out of the case & start over.
- Place the motherboard on a non-conductive surface on the bench. The box the board came in will work nicely. Are you 100% sure you installed the CPU & HSF correctly? If not, remove them & check for damage. When you reinstall the HSF, use a very thin line of paste down the center of the CPU & make sure it's properly oriented. Follow these instructions...pay attention to the note in the lower right:
- Install ONE stick of RAM only.
- Install a video card (either standard PCI or PCI-e) & connect monitor to card.
- Connect the PSU to the motherboard (both 24-pin plug & 4-pin plug) & connect to video card (if required).
- Connect keyboard, preferrably PS/2.
- Do NOT connect anything else.
- Power up the monitor & PSU, then start the board by pressing the power button next to the RAM slots.
If you get a display on the screen, use the keyboard to enter the BIOS & immediately go to the PC Health menu to monitor your CPU temp. Wait a minute or two for the temp to stabilize. If it seems to be OK, manually configure all the BIOS settings for best performance.
The next step I would perform would be to install the rest of the RAM, then connect either a floppy drive or optical drive & run memtest86. It may take 30 min or longer to run one complete series of tests. If it completes the series with no errors, you can be reasonably sure the RAM is good.
Now install just the above hardware in the case & connect the case wiring. Power up to double check that you didn't short anything out during the installation. If everything appears to be OK, shutdown, install the rest of your hardware, then install the OS.
If the above doesn't work, you'll know what to do next time.