Solved My Pc is not using whole of 4 GB(usable 3.5 GB) Tags: Memory Western Digital Last response: November 12, 2011 6:34 AM in Memory Share DArky_08 November 7, 2011 3:32:02 PM Hi, Today i bought my PC , AMD FX-x4 MOBO- gigabyte 880gm-D2H RAM- crossair 4 GB(1 piece) WD 500 GB HDD now my prob is, i installed windows 7 64 bit .But still my pc is using only 3.50 gb of 4 gb . And my bios is also updated to 2.4(latest for my MOBO). what i am doing wrong?? More about : usable Best solution ko888 a b } Memory November 7, 2011 3:43:11 PM In your CMOS Setup Utility --> MB Intelligent Tweaker(M.I.T.) --> IGX Configuration What is the UMA Frame Buffer Size set to [Auto] or [128MB] or [256MB] or [512MB] ? Frame buffer size is the total amount of system memory allocated solely for the onboard graphics controller. Share DArky_08 November 12, 2011 6:33:19 AM Best answer selected by DArky_08. m 0 l Can't find your answer ? Ask ! Get the answer DArky_08 November 12, 2011 6:34:14 AM thx ko888. i got it m 0 l Can't find your answer ? Ask ! Publish Related resources Solved4 gb installed but only 3.5 usable in 64 bit windows 7 Forum 4GB Ram Installed But 3.5GB Usable??? Forum 3.5 of 4GB ram usable Forum SolvedMy PC has 8GB of RAM it used to have 7.90GB usable but now its 3.16 GB usable what do i do Forum Solvedolder hp pavillion upgrades a6234x showing 6gb ram only 3.5 usable Forum In Windows 7 unable to use my whole 4gb ram. Forum Solved64 bit only using 3.5gb of 4gb Forum Solved16GB ram installed, 3.5GB usable Forum SolvedI have 8gb of RAM but I only have 4gb usable. Forum SolvedWindows 7 64 Bit 4GB installed but only 3.48 usable Forum SolvedI installed 4 gb ram but only 1.60 gb is usable Forum Solved4GB of RAM, only 3GB detected (1.75 usable) 64 BIT WINDOWS Forum Solved8gb ram only 3,5 usable Forum I installed 2GB X 4 in my PC why is it that only 3 5 is USABLE? Forum Win8 32 bit sees 8 GB RAM (usable 3.5 GB) but 64 bit restarts on 8 GB of RAM. Please help. Forum Solvedi have installed 6gb of ram one 4gb 1600mhz and another 2gb 1600mhz my pc shows total memory installed 6gb but only 3.88 usabl Forum Solvedhalf the time i have 4 gb RAM, the other half i have 4gb (2 usable). Forum I used 4GB RAM but it is usable 3 24GB But why ? Forum SolvedUpgrading from 4GB PC-6400 to 8GB PC-8500 on a P35 Mobo w/ Q6600 cpu Forum Solved4GB. 3.12GB Usable Forum More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !