I know its a 7200RPM, so are mine, but thats not what i ment.
Its just a Slow Harddrive with Seaking and Data transfer, infact its one of the slowest 7200RPM SATA HDD i know.
The rest of your system is really fast but the HDD is holding it back a little, thats why i sugest to fit a Samsung F1 or F3, its just a waste having such a slow HDD in there.
Here is a big Test of a number of HDD, the ones marked in Red are 2.5" HDD, Yours (Hitachi P7K500 500GB) is easy to find, in every test it ends somewhere near the bottom.
Its a Dutch site, but you just need to look at the Graphs: http://nl.hardware.info/reviews/1685/vergelijkingstest-58-harde-schijven
Just klick "Volgende Pagina" to go trough the Test Results.
And before you buy a SSD, think again...
A: Verry little space for your money
B: Cheaper ones drop like flies if you run games from them
C: They get slower and slower overtime
I rather stick with a "normal" fast 1TB 7200RPM HDD than, or get a WD Velociraptor 600GB 10000RPM HDD since that has enough space to put Windows 7 on and all of my games, music and movies i would just keep on a "normal" drive or on my Network Server.