taduyducvn Posted August 24, 2011 Share Posted August 24, 2011 I just bought another 4GB DDR3 ram on top of my 2GB DDR3 ram. Unfortunately in MAC Os X Activity Monitor only showed up 3GB total memory. While in System Profiler, all 2 ram are showed up, and the total is 6GB I tried to reboot to Windows, Bios showed only 3008MB out of 6GB. Dxdiag and Task Manager shows 6GB Total in my windows 64Bit. Updated to newest bios and it's all the same. 3008MB What could it be the problem for this? Link to comment https://www.insanelymac.com/forum/topic/266334-6gb-ram-show-up-only-3-in-activity-monitor/ Share on other sites More sharing options...
PookyMacMan Posted September 15, 2011 Share Posted September 15, 2011 I just bought another 4GB DDR3 ram on top of my 2GB DDR3 ram. Unfortunately in MAC Os X Activity Monitor only showed up 3GB total memory. While in System Profiler, all 2 ram are showed up, and the total is 6GB I tried to reboot to Windows, Bios showed only 3008MB out of 6GB. Dxdiag and Task Manager shows 6GB Total in my windows 64Bit. Updated to newest bios and it's all the same. 3008MB What could it be the problem for this? Are you running OS X in 64-bit? If not, add this to your com.apple.boot.plist under kernel flags: force64 arch=i386 Try that and see what happens. Link to comment https://www.insanelymac.com/forum/topic/266334-6gb-ram-show-up-only-3-in-activity-monitor/#findComment-1748608 Share on other sites More sharing options...
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