Motherboard not recognizing all of RAM

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juliusjackson

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Apr 20, 2014
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I recently added a 4gb DDR3-1600 to my motherboard, and today I noticed that instead of my motherboard recognizing 12gb (4gb x 3sticks) it is only recognizing 8gb. What can I do to fix this?

Is the problem that the two other memory sticks are DDR3-1333?


General Specs:
Motherboard: https://www.asus.com/Motherboards/SABERTOOTH_X58/overview/
OS: Windows 8.1 64-bit
 
Solution
J
Mixing memory is always a bit risky, sometimes they work together, sometimes not, also your mobo is triple channel, it may also not like a different stick being the '3rd' channel, it may want them to be identical.
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jimpz

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Jan 20, 2012
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Mixing memory is always a bit risky, sometimes they work together, sometimes not, also your mobo is triple channel, it may also not like a different stick being the '3rd' channel, it may want them to be identical.
 
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Solution
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juliusjackson

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Apr 20, 2014
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I've noticed that my BIOS is outdated by a few years. I will update it and report on whether this update fixes any RAM recognizing issue.

However, is there any other recommendations? I currently have the 2 identical sticks side by side (A0,A1 port) and the non-identical stick on B0.
 
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juliusjackson

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Apr 20, 2014
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I've updated the BIOS and I suppose the issue is now that under the DirectX Diagnostic Tool for Windows under Memory indicates only 8gb.

I also ran CPU-Z and that program does indicate 12gb of RAM.

After moving the non-identical stick to A2 my monitor would not turn on at all. So, I moved it back to slot B0. I've run out of ideas.
 
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