$sudo dmidecode |grep -A16 "Memory Device"

Memory Device
	Array Handle: 0x000F
	Error Information Handle: No Error
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 2048 MB
	Form Factor: SODIMM
	Set: 1
	Locator: M2
	Bank Locator: Bank 1
	Type: DDR3
	Type Detail: Synchronous
	Speed: 1334 MHz
	Manufacturer: 4444            
	Serial Number: 44444444        
	Asset Tag: 4444
	Part Number: DDDDDDDDDDDDDDDEDD