Dell XPS 435t 12gig Ram Limit?

dmorgan924

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Jun 10, 2011
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I have a dell xps 435t, with a i7 920. I have 18 gig of ram installed, but windows 7 pro says only 12 is usable. I called dell and they said that 12 is the limit.

is there a way to change that? so i can get the 24 gigs? or would I have to get a new motherboard?