ThinkPad X230 – faster RAM and comparison between single channel and dual channel speed – Ioannis Karagiorgos blog
Memoria Ddr3 666 Mhz | MercadoLivre 📦
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