final capacity SHOULD be
18.626451492 GiB

FYI operating systems measure in Gibibytes(based off of powers of 2) Vs. harddrive manufacturers which measure in Gigabytes(based off of powers of 10).

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system: Intel Core 2 Duo e6400 @ 3.6GHz; 4*1GB RAM(micron D9GCT) @ 450mhz(DDR2-900) 4-4-3-8; Enermax Liberty 400AWT PSU; nvidia GeForce 8800GTS 640mb (660mhz core; 2120mhz mem)
OBAMA and BIDEN - 'we fight for you, blah blah we fight for you', theres only one man in this election that has fought for you, ONLY ONE and its not Obama.