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 aboutddr3 usable
Could you provide a bit more info like OS and version as well as an image of where you see 2 GB usable?
OS windows 7 Ultimate 64bit Cpu i5-750 Mobo Ga p55a ud3