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
Garage Sale : Used Samsung 2gb 665Mhz DDR3 X 2 for desktop, Computers & Tech, Parts & Accessories, Computer Parts on Carousell
motherboard - Why is my memory running at 665Mhz when the BIOS is clearly set to be higher? - Super User