Help on memory config HP DL380 G7

bonox

Member
Feb 23, 2021
58
13
8
Hello All

Now that HP has discontinued their memory configurator software i'm a having trouble populating a DL380 G7. I've got the following RDIMMs:

(8) 2Rx4 16GB 1600MHz modules
(4) 4Rx4 16GB 8001066MHz modules
(5) 2Rx? 16GB 1333MHz modules

and a large collection of 2Rank 8GB modules.

The rules seem to be no more than 8 ranks per channel
Highest rank furthest from the processor (don't know what this means), but it appears to be the first (white) slot per channel on a physical layout basis.
If three slots are populated in a channel, everything resorts to 800MHz
If any quad rank module is used, limit of 2 modules per channel on all channels - think this only applies to one processor if no quad rank on the other processor.

In theory I should be able to spread the four rank modules across four channels and fill the rest with a pair of 2 rank modules to stay under that cap. All the modules are DDR3-800 or higher so that should work, but in any of the configurations i've tried so far I get screaming error warnings saying DIMM not supported or else Unsupported configuration, 180GB available/256GB Installed. It's set to advanced ECC mode. I'm really just trying to max out a box for ARC on Truenas so max memory speed is less important than quantity for this exercise. I think i'm falling foul of the last rule on a combination of technicalities.

Can anyone help with a way to install these modules to max this thing out with what i've got please? best I can do so far is 232GB, 9x16 on one proc and 3x16 + 6*8 on the other proc, and throwing the 4R 16GB units away. The maths says i should be getting 8GB more than the machine is telling me.

Thanks muchly, b
 
Last edited:

Storm-Chaser

Twin Turbo
Apr 16, 2020
146
23
18
Upstate NY
I have the same server and I have populated all the ram slots. I might be able to help. But I think the first thing to do is settle for identical memory. You have too many variables in play right now to properly assess the problem. Please post the specific memory part numbers here and we can hope.
 

bonox

Member
Feb 23, 2021
58
13
8
Thanks Storm

(8) 2Rx4 16GB 1600MHz modules
SK Hynix 16GB 2Rx4 PC3L 12800R Part Number HMT42GR7AFR4A-PB


(4) 4Rx4 16GB modules

Samsung 16GB (1x16GB) PC3L-8500R 4Rx4 RDIMM 1066MHz DDR3 ECC REG LV
Product Code: M393B2K70DM0-YF8


(3) 2Rx? 16GB modules Kingston KTH-PL316/16G

(lots) 2Rx4 PC3-10600R Samsung M393B1K70DH0 and Kingston KTH-PL313/8G
 
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Storm-Chaser

Twin Turbo
Apr 16, 2020
146
23
18
Upstate NY
I think we found the root cause of your no post situation. I downloaded the user guide and turned to page 45, the memory installation guide. Here is what I found:

1637381934560.png

More information on memory related specs (if you haven't already seen this):
1637382041499.png

For help identifying the proper memory for your server check this out. Bottom line you are going to need to invest in ddr3 1333 memory kit. There is a high probability you will be able to find a cost effective memory kit for your server on eBay. I recommend populating all the memory slots for maximum memory throughput since you are only able to run 1333Mhz in that, plus the timings on server memory are very conservative....

1637382273016.png
 

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bonox

Member
Feb 23, 2021
58
13
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Thanks, but they are all the same type - they're all RDIMMs. With a bit more trial, it was the last quad rank condition that was the issue. If I use any of the samsung 4R units, that whole processor side can only have six slots filled. (2x2x2) and all of them resort to 8500/1066MHz. These units have been in it from the start from years and years ago, just four only. I just hadn't appreciated the limits of the memory controller that the quad rank module instruction implied. So 15 of 18 slots filled and 232GB.
 

Storm-Chaser

Twin Turbo
Apr 16, 2020
146
23
18
Upstate NY
Thanks, but they are all the same type - they're all RDIMMs. With a bit more trial, it was the last quad rank condition that was the issue. If I use any of the samsung 4R units, that whole processor side can only have six slots filled. (2x2x2) and all of them resort to 8500/1066MHz. These units have been in it from the start from years and years ago, just four only. I just hadn't appreciated the limits of the memory controller that the quad rank module instruction implied. So 15 of 18 slots filled and 232GB.
Is posting now with the separate type of memory?
 

bonox

Member
Feb 23, 2021
58
13
8
yes, it's posting. Not sure what you mean by different type - they're same type of dimm (registered), but different speeds and rank count. The problem was I had seven modules in the bank that contained the four rank modules instead of the permitted six.

All good to go thanks :) Would just be nice if HP would update (or at least just make the old version) of the memory configurator tool available again.