Need help on my 24GB upgrade which shows 16GB usable Tags: Memory Dell Studio Xps Last response: October 21, 2012 8:31 PM in Memory Share datsunking August 3, 2012 3:29:30 PM Why only 16GB is usable? I'm using a DELL XPS 435T destop... More about : 24gb upgrade shows 16gb usable nikorr a c 146 } Memory August 3, 2012 3:35:20 PM U need to have W7 Pro and up. If u have W7 Premium or less, its only up to 16GB available. m 0 l 03fastmach1 October 21, 2012 8:31:07 PM I am using Ultimate and still having this problem. m 0 l Can't find your answer ? Ask ! Publish Related resources SolvedDeciding which parts I need to upgrade. Help? Forum Need help deciding what to upgrade, or which chipset to move to. Forum SolvedNeed Help upgrading video card but unsure of which card Forum I need help deciding which Graphic's card to pick for a upgrade. Sapphire R9 270X Toxic Edition VS AMD R9 280 Forum I need help choosing which parts to upgrade. (CPU+GPU+Mobo+Monitor) Forum $100 budget increase, need help deciding which part to upgrade Forum Need helping deciding on which system to upgrade to Forum More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !