Dell XPS, Win 7 Ultimate downgrade memory question

SpecialHugs

Distinguished
Sep 11, 2009
2
0
18,510
I bought a Dell XPS 8700 I5, with 12gb ram. It had a hard drive with Win 8.1. I changed the hard drive and installed Win7 Ultimate 32 bit, now only shows 3.47 usable. Is there a way to get it to see the 12 gb or do I need to go back to Win 8.1?