Crucial Ballistix Gaming Memory HTML Page (EN) | Crucial.com
CPU-Z reports that a DDR3 1333 Memory is capable of going upto 667Mhz! | Tom's Hardware Forum
Why Task Manager shows 1333 Mhz and not 2666 Mhz despite adding 2*2GB 1333 Mhz (DDR3 KIT) and CPU-Z shows Dual Channel & DRAM Frequency at 665 Mhz? - Quora