32GB of RAM 16GB Usable

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TehSteward

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Feb 25, 2014
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I'm not sure why this is happening, possibly due to the wrong memory type? But I have 32GB of Corsair Vengeance (4x8GB) DDR3 1866 MHZ (PC3 15000) Desktop Memory (CMZ16GX3M2A1866C10) on an Asus SABERTOOTH 990FX R2.0 motherboard. I'm using Windows 7 Professional x64 and I still don't know why it won't work.
 
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TehSteward

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Feb 25, 2014
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I did buy the RAM in a matched set. It was 2 seperate packages each containing 2 8GB sticks. The mobo isn't all that new and the RAM speeds in the BIOS are set to 1866MHz
 
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Tradesman1

Tradesman1

Legenda in Aeternum
Jun 5, 2013
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Might be that it's two separate packages, mixing DRAM even of the same exact model can be problematic. They sell DRAM in a variety of packages for a few reasons, among them the sticks in a package are all tested to work together, also the XMP programming is done by the package, i.e. 4 sticks require a higher tRFC advanced timing than do 2 sticks, this is why 4 stick sets cost more than a pair of 2 stick sets generally, the additional testing. Problem also, in part is few AMD CPUs can run 4 sticks of 1866 DRAM, they (the FX CPUs) are only rated up to 2 sticks at 1866 (1 stick per channel), best bet might be to try running 1600 at 9-9-9-26, prob about 1.6 on DRAM voltage and 1.3 with CPU/NB voltage
 
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TehSteward

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Feb 25, 2014
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Well even dropping it down to 1600 and setting to those voltages still shows 16GB usable. I also have a couple questions, I'm not the best with computer knowledge unfortunately.
Would 16GB at 1866MHz be better or worse than 32GB and 1600MHz or 1333MHz?
I have an AMD FX 8350 processor and a mobo with 4 RAM slots. What would be a good 32GB RAM set for my processor?
 
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calebryan

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Mar 28, 2014
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I am sorry to say Windows (edited by Tradesman1 for profanity) decided 16GiB of RAM was enough for any user so (to my knowledge) isnt an edition of Windows that can support more than that amount. It wont use it, might be able to see it, but it wont use it.
 
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calebryan

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Mar 28, 2014
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It wont matter as stupid Windows only sees and uses, and supports 16GiB
 
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Tradesman1

Tradesman1

Legenda in Aeternum
Jun 5, 2013
67,883
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________________

While I edited out the stupid f**** comment, you need to take a look, there are numerous versions of Win that support in excess of 16GB of DRAm - how do you think people are running rigs with 32 and 64GB of DRAM?
 
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