4x2GB and a 1x16GB, what is best configuration?

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Darrell Faber

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Aug 1, 2013
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Have a Dell Precision T7600 that has:

Quad channel; up to 512GB1600MHz or 1333MHz ECC RDIMM memory; 16 DIMM slots (8 per processor)
(512GB config uses 1333MHz 32GB LRDIMMs)

It came with 4 sticks of 2GB, but I have an additional stick of 16GB. What is the best configuration to use?
 
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Estix

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Apr 12, 2012
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Assuming that both processors are installed, I'd say try 4x2 for one, and just the 16 for the other.

Whichever one has the 16GB DIMM will be running in single-channel mode anyways, so you may as well let the other run in quad-channel.

Disclaimer - I do not own a dual socket system, and have not tested this.
 
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Darrell Faber

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Aug 1, 2013
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I should have clarified, the 2nd socket is not in use. Just a single processor with 8 DIMM slots, that I think are 2 sets of quad channel.

 
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Estix

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In that case, unless you need more than 8GB of RAM (which is possible for a server/workstation), just go with 4x2. running it with capacity-mismatched DIMMs won't hurt anything, but will cause it to run single-channel, which would be slower.
 
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Darrell Faber

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Aug 1, 2013
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Thanks for the cpuz suggestion. It is showing up as quad channel 23GB when I fill up the primary quad channel slots with the 2GB modules and then place the 16GB module in the first slot of the secondary quad channel slots.

 
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Estix

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Apr 12, 2012
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This is why I put a disclaimer at the end of my post; I was beyond my knowledge :)
 
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