XMP not working
the product refuses to run at indicated XMP speed. I tried with a different cpu and mobo but it keeps restarting my pc while under heavy load. I spent lot of money for 5600mhz c36 and i can onty run it at SPD speed (4800mhz C40). Gskill is aware of the problem so they released new version (with J instead of U in the serial name) to avoid bad reviews and customers rma. Don't get U version if you want your system stable.