Useable memory Tags: Memory Windows 7 Last response: February 17, 2010 7:13 PM in Memory Share josh93 February 15, 2010 6:09:29 PM I have windows 7 64 bit with 8gb installed memory. but it says that only 3.18 gb is useable. can make more of the memory useable and if so how do i do it? thanks More about : useable memory marcellis22 February 15, 2010 6:16:25 PM What motherboard do you have? Company, model, REV#... josh93 February 15, 2010 6:36:07 PM asrock P55 extreme on the windows base scores it says that 8gb is installed but only 3.18 is useable Can't find your answer ? Ask ! Get the answer marcellis22 February 15, 2010 7:13:20 PM The board supports 16gb, what version of Win 7 are you running? josh93 February 17, 2010 7:13:35 PM i am runing the home premium 64 bit version Can't find your answer ? Ask ! Publish Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !