programem cpu-z
http://www.jens-hartmann.at/Fritzmarks/dmgary_cpu- z.jpg
Ale muzu ti na 99,99% rict, ze tam mas 1x 4GB modul a druhy je neobsazeny
EDIT
http://translate.google.cz/#auto/cs/Tools%20are%20 not%20needed%20to%20open%20the%20maintenance%20cov er
http://www.notebookcheck.net/typo3temp/_processed_ /csm_4540s_Unterseite_03_895913d3b2.jpg
http://www.notebookcheck.net/Review-HP-ProBook-454 0s-Notebook.85978.0.html