03-05-2014 07:43 AM
Samsung 4GB SODIMM DDR3 PC3-12800 CL11 (M471B5173QH0-YK0) is compatible with Samsung M471B5773CHS 2GB 1333MHz DDR3 CL9-CH9 can put them together in laptop
It's not recommended to use two different modules. PC3-12800 is a 1600Mhz module and the CAS Latency (CL) is also different. I wouldn't recommend it.
HP ProBook 640 Sabayon LInux
HP Touchpad provided by HP
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