V tom ProBooku by si mal mat 1x4 GB SO-DIMM 4GB DDR3 1333MHz CL9, takze dokup nieco s podobnymi parametrami...napr. http://www.alza.cz/patriot-4gb-so-dimm-ddr3-1333mh z-cl9-signature-line-d169368.htm#popis alebo http://www.alza.cz/kingston-so-dimm-4gb-ddr3-1333m hz-cl9-sr-x8-d340198.htm. Stiahni si CPU -Z z www.cpuid.com a tam presne zistis ake mas RAM, ked kliknes na kartu SPD.