Trying to reach 768GBs of RAM in X9DRi-LN4F+

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Oflyttbar

Member
Nov 4, 2017
31
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8
Hello all! First off, thanks in advance for commenting :D

I have a X9DRi-LN4F+ motherboard, E5-2600 v2 CPU's and 24x 32GB 4Rx4 RDIMM's (M393B4G70BM0-YH9) and I'm trying to reach 768GB's. I am able to achieve 512GB's @ 800mhz but anything more and the motherboard won't post ( powers on, no beep codes, black screen).

My main hang-up is trying to interpret this chart. It just doesn't make much sense to me.


I'm guessing I'm in the "N/A" territory so it's not working? But I don't understand why and I don't understand how this motherboard is able to support 768GBs of ram normally?

Any help is much appreciated!

-Oflyttbar

Motherboard:
Supermicro | Products | Motherboards | Xeon® Boards | X9DRi-LN4F+
RAM:
M393B4G70BM0-YH9 | RDIMM | Samsung Module | Semiconductor
 

jseba

New Member
Aug 31, 2014
21
4
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Rolla, MO
According to your memory’s specifications, it’s 4Rx4 or quad rank (QR) which is the second to last row on that chart. So that’s why you’re in the “N/A” section. It looks like that board requires dual rank (DR) or single rank (SR) DIMMs in order to fill all the slots.
 

azev

Well-Known Member
Jan 18, 2013
768
251
63
I think you can achieve 768GB by using LRDIMM module. The most I've done is 512GB with speed all the way up to 1600 with LRDIMM module.
 
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nthu9280

Well-Known Member
Feb 3, 2016
1,628
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San Antonio, TX
There is a limit of 8 total rank per channel. There is a document on Supermicro site regarding X9 board memory configuration.

If you are using 4R, you can only use 2 DPC. You can mix ranks but but order matters. I think you populate the higher rank away from CPU in each channel.
LRDIMMs behave different. Though they are 4R present as 2R.
 
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