You could still many games depending on how large with only 2gb installed while 2.5gb is the usual recommended minimum for the 64bit Windows. Onboard graphics and any intense gaming is another story there since most onboard graphics sadly lacks to start with.
Some system specifications like make and model might help a bit here however. The Dell support page for specifications lists either AMD or Intel seeing upto a 4gb capacity for memory. Documentation
What lacks there is just much onboard video memory is present. Plus you cpu is on slow side for an Intel model. You have adequate physical memory, But the main concern again is with the onboard video there.
I juat ran into your first thread seen at gaming in windows 7 ultimate x64
by the way. oops! duplicate