4Gb of DDR3 ram, only 2Gb is Usable Tags: Chipsets DDR3 RAM Motherboards Last response: July 10, 2011 12:45 AM in Motherboards Share Steyene July 9, 2011 6:50:32 AM Hi, sorry if this is a repeated question, I have GA p55 UD3 mobo with a 1st gen i5750. I have 4Gb of ram on the board, CPUZ shows 4Gb as does CCleaner, but in the sys info page it says only 2Gb is usable. Any starting points? More about : 4gb ddr3 ram 2gb usable GhislainG a c 191 V Motherboard July 9, 2011 4:09:55 PM Could you provide a bit more info like OS and version as well as an image of where you see 2 GB usable? Steyene July 9, 2011 10:57:57 PM OS windows 7 Ultimate 64bit Cpu i5-750 Mobo Ga p55a ud3 img 1 2nd img edit: another image that might be useful Related resources 4GB of RAM , but only 2GB usable ? - Forum Windows 7 4gb ram only 2 GB usable - Forum 4GB Installed - 2GB Usable - Forum 4GB ( 2GB usable ) - Forum 4gb installed 2gb usable . - Forum Can't find your answer ? Ask ! Get the answer apache_lives a b V Motherboard July 10, 2011 12:36:09 AM perhaps update the bios, reset the cmos and see what effect that has, also reseat the memory just incase also there may be some boot.ini settings limiting your memory, or some bad legacy app perhaps - a fresh install will cover all this to confirm Steyene July 10, 2011 12:45:09 AM Turns out I had a bad stick of ram... messed around and it would boot up with one of the sticks in there. Thanks any way guys Can't find your answer ? Ask ! Publish Related resources: Forum6GB RAM installed 4GB Usable help?????? ForumInstalled 4gb of RAM memory, but BIOS says only 2.5gb are usable Forum4GB RAM ( 2GB usable ) Forum4GB Ram ( 2GB usable ) Lenovo Forum64-Bit Windows 7 Shows 2.75GB Usable Ram out of 4GB ForumOnly 4gb of 6gb RAM listed as " Usable " ForumWin7 64bit 6gb RAM shows only 2gb usable Forum[Solved] 8GB Installed, 4GB usable on Windows 7 64 bit Forum8Gb Memory DDR3 , recognized 6Gb usable 4Gb ForumP7h57, i5-760 and 2x8gb Forum[Solved] CL7 or CL9 Corsair 4gb XMS3 1600Mhz ForumW7 only detecting 2GB of 3GB ForumWhat is difference between ddr2 and ddr3 ForumDdr3 1600mhz 7-8-9-24 vs ddr3 1333mhz 7-7-7-21 Forum[Solved] 8g vs 4gb RAM More resources Read discussions in other Motherboards categories BIOS Boot Chipsets ASRock Asus Chaintech DFI Elitegroup FIC Foxconn Gigabyte Intel MSI-Microstar !