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I have Windows 7 Home Premium (64 bit) OS installed. My motherboard is able to handle up to 32 GB of RAM.
I recently upgraded my computer to 20 GB of RAM, but the computer says installed RAM is 20 GB (16 GB usable).
I have four slots on the MB, and I installed two 8 GB RAM closest to the CPU and two 2 GB RAM on the remaining slots.
I made sure the RAM are the same (DDR3 1600 MHz)
What am I doing wrong? Why am I seeing this issue in my computer's Control Panel Home?
Just in case it matters, I also installed GTX 770 GPU 2 GB memory.
Here is the specification on my motherboard: http://www.asus.com/Motherboards/P8P67_LE/specifications/.
You have verified all 4 modules work? Check both sets of 2 – Ramhound – 2014-09-14T02:25:28.040
1Could you post more info, like chipset and mobo? The GTX 700 series will use up to 2GB of system RAM but not unless it needs to. – Louis – 2014-09-14T02:30:06.200
5Dream on. I would personally upgrade to windows 8, which handles resources much better then windows 7 anyway AND makes the last 4GB available too. win-win situation. – Viezevingertjes – 2014-09-15T13:29:17.400
1I'm so used to working with Windows 7 I don't have the patience to learn Windows 8. My parents have Windows 8 and it's been frustrating for me to use. – Chairman Meow – 2014-09-15T16:30:25.843
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FWIW it appears you don't have the optimal install for your RAM. According to the user manual for your motherboard the slots are labeled A1 (closest to CPU), A2, B1, B2 (farthest from CPU). In other words you have dual channel setup. For fastest (dual channel) operation, you should install the memory in alternating order 8GB (closest to CPU), 2 GB, 8GB, 2GB (farthest). See also Multi-channel Memory. I believe that on Intel boards, the order only affects the speed of the RAM, and does not affect the amount of RAM the OS sees.
– chue x – 2014-09-15T19:17:05.2431@MrMichael "win-win". Indeed, so to speak. – imallett – 2014-09-16T00:35:47.740