x124 BSOD on 1st StartUP and gaming

Sapphire Recommends a 500W PSU. Try removing the graphics card from the computer and run off of on board graphics. Also, go into bios and set optimized defaults. Go to sata configuration and set it to what it is set to now (IDE or AHCI), set the USB configuration, ram timings, voltage, and frequency, set the boot order, save and exit. Make sure your SSD is connected to an Intel port 0 or 1. See if that makes things better. If you still have trouble with the keyboard, try an extra one if you have it or borrow one from a friend just to test.

imMolyko, thanks for letting us know. But, you didn't tell us what the results were. Did you still get BSODs? If you have the option, see if you can borrow another PSU from a friend to try before buying. I would hate for you to spend money on something that isn't causing the problem. If you do buy one, I don't know the prices or what brands are available where you are. I would recommend a 700-750W Corsair, Seasonic or Antec PSU. That would allow your PSU to not strain running your system. The PSU would run quieter, cooler and last longer, plus you will have extra headroom for future upgrades if you decide to. Also, did you manually set the ram timings, frequency and voltage in bios to the manufacturer's specs? The timings and voltages will be on a tag on the ram sticks, and are they a matched set?

You can test your ram - RAM - Test with Memtest86+
Test your CPU - Hardware - Stress Test With Prime95
During the CPU test, use either Core Temp or Real temp to monitor your CPU temps very closely. It will get very hot. If it gets too hot stop the test.

Download CPUID - System & hardware benchmark, monitoring, reporting and post snips of it with the CPU, Memory, and SPD tabs open.
Screenshots and Files - Upload and Post in Seven Forums

You can also try reinstalling your USB 2.0 and 3.0 drivers.

Thanks for the shots, mMolyko. But could we get a shot of the Memory tab too?