memory - DDR2-800 (PC2-6400) RAM is clocked at 200MHz? - Super User
VEINEDA DDR2 800Mhz/667Mhz 4gb Super Speed Memoria Ram pc2 6400 for Motherboard Desktop - AliExpress Computer & Office
8GB 2X 4GB DDR2 PC2-6400 800MHz 200 pin SODIMM Laptop Memory RAM for HP Pavilion Entertainment Notebook dv7 1200 1400 Series (PARTS-QUICK Brand) at Amazon.com
cpu - 800 MHz DDR2 RAM shows half of memory speed on my machine - Super User