Screen freeze, now wont post, error codes 15,40,4F

I was playing a game which had my pc running everything pretty good, nothing major, temps were normal everything was fine, when the screen froze and the sound repeated, i shut off my pc, tred to reboot, and nothing. will not post. i simply get the error codes 15,40,4F on the motherboard.

Given those POST codes, 15, 40, 4F, that indicates a memory problem.

It is rare for memory to fail spontaneously, but it can happen. All it takes is one memory chip to fail, or if one of the DIMMs is not in its DIMM slot completely.

Two things for you to do. Remount all of your DIMMs, and clear the CMOS/BIOS.

If POST still fails, start checking the DIMMs for failure. Try one at a time in the slots farthest from the CPU in each channel. Try to keep track of which DIMMs you tried and did not try. Each time you change the DIMM or DIMMs, clear the CMOS/BIOS.

What board are you using, and what memory?

I have checked both Sets of Ram, and they both give the 15,40,4F errors. They were Team Xtreme 8GB sticks TXD38G2400HC10QBK RAM, THEY WERE SET AT 666.6 MHZ And i set them for their correct 2400MHZ in the bios, then a week later, IE. now, and they both seem to have gone out... little bit depressed that they seemingly could not run at their actual native setting.