I had a A8 5600K in my motherboard with 1x8gb. Upgraded to 16gb (2x8gb) but only recognized 8gb in BIOS, so contacted support of the motherboard builder and they told me to check the pins. In fact one of the pins was bended and fall off (maybe my fault when changed fan months ago). Tryed my luck and bought a Athlon X4 760k second hand. Problem solved, 16gb readly available. Now I have a CPU I don´t need and will sell it but don´t want to cheat nobody as the pin is damaged and so only half the memory installed is recognized. How much is this CPU worth ( if anything ) as defective? Everything works fine, Windows 10 runs without trouble, maybe some games ( don´t know about that because I don´t play )...only real problem is second DIMM slot is useless. Maybe appeal to somebody interested in CPU study or a casual Windows user. Any guess?