Unfortunately, my first delivery was provided with a defective module, but what Amazon can not. The exchange went very quickly and the replacement worked perfectly. The amazing thing about this store is its compatibility with AMD FX processors. Although he is only advertised with Intel CPUs, it works ausgzeichnet 1.65 volts with an FX-6300 @ 4.3 Ghz and 2.4 Ghz NB-clock with 11-11-11-33 2400 MHz. The 6300 is installed on an ASUS M5A99FX Pro R2.0 with the latest UEFI version in 2501. Also with 4.4 Ghz and 2.2 NB memory 1866 MHz with 8-9-9-27 is outstanding to 1.5 volts. I highly recommend this RAM modules for AMD FX-users fully.