First of all, thanks for reading. Ok, so here's my current config: - Asus M4A87TD EVO - Corsair Dominator-GT DDR3 2000 mhz (CMT4GX3M2A2000C8) - Phenom II x4 955 (125w) Black Edition - XFX nVidia 8800 GT (rather old, I know) - Thermaltake Purepower 600w And my main problem is that the computer won't even post. I do not get any beeps nor the DRAM_LED for MemOK! lights up. All fans spin. Things I've tried: - Disconnected ALL components, including ATX 12v power connector and graphics card. Only things left were CPU, CPU fan, 24-pin ATX power connector, power and speaker. No luck. I get no lights or beeps whatsoever. - Tried either RAM memory stick in each slot. - Switched graphics cards (tried with an ATI card). - Reinstalled twice the CPU and checked for bent pins (there were none). Applied a thin layer of thermal paste and mounted the heatsink. Only one RAM stick. Graphics cards. Both ATX connectors connected. Reassured PC speaker was correctly connected, as well as power and reset switches. - Changed internal PC speaker switch orientation. No luck. Still no beeps, no DRAM_LED light and no video. One thing to bear in mind is that my memory sticks are not in the QVL. However, I still do not get any response when NO memory sticks are installed. Also, I've been using the PSU for over two years. Never had any problems with it. I seriously doubt this is a faulty PSU case. Any advice guys? Any help will be greatly appreciated. Please, feel free to ask any questions you may think appropriate.