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March 13th, 2024 07:53
PowerEdge R730 and 32GB RAM modules
HI
We tried to upgrade R730 from 64GB (4x16GB modules) to 128GB (4x32GB modules), but somehow shows BIOS, that these are 16GB sticks and system stalls at memory configuration. The new modules are Kingston Dell KTD-PE426/32G with speed of 2666MT/s but I read, that sould not be a problem with newer BIOS.
What could be the problem here? Memory layout is the same as original (A1,A2,B1,B2 -- that is a dual CPU system).
Thanks..
Tiit
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DELL-Chris H
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March 13th, 2024 12:33
Tiith,
If the server is up to date on BIOS and iDrac, and it is also causing the server to hang at the memory configuration, it may be a compatibility issue. Would you confirm, or provide a picture, of the label on the dimm itself. I ask as it looks like some of these are 14th gen compatable and some are 14th generation.
Another thing you can try is removing the dimms from A2 and B2, and just testing the dimms on A1 and B1, and let me know what you see.
tiith
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March 13th, 2024 14:38
@DELL-Chris H
Hi and thanks for answering. There is the picture from the memory module.
(edited)
DELL-Chris H
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March 13th, 2024 14:58
I am not able to confirm that those are supported on the server. Did you test the dimms by just installing in A1 and B1, if so what was the results of that test?
tiith
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March 14th, 2024 07:07
@DELL-Chris H
Sorry, not jet because that is a production server and we are in talk for a offline timeframe.
But I will test that, if we get permission. What RAM-s would be best option for 32GB sticks?
Tiit
DELL-Chris H
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March 14th, 2024 12:11
Tiith,
The one I see, with the specs you were looking for, would be part # TN78Y.
32GB, DIMM, 2666MHZ, Registered, DDR4, 288 Pin, Dual Rank, 1.2V, ECC
tiith
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March 15th, 2024 07:34
Ok ..then maybe is the culprit Dual and Quad rank -- that is the only difference I see here.
Thanks..
Tiit
Dell-Martin S
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March 15th, 2024 14:08
Hi,
Combining dual and quad-rank memory modules in the same system is generally not recommended. Here's why:
Performance Impact:
Quad-rank DIMMs have four times the number of memory chips compared to dual-rank. This can strain the memory controller, potentially reducing overall memory performance.
Mixing ranks can lead to uneven memory access patterns, further impacting performance.
Compatibility Issues:
Some systems may not be designed to handle the different access timings of dual and quad-rank DIMMs, leading to instability or crashes.
However, there are some situations where it might work:
Limited Options: If you need more memory capacity and quad-rank is the only option available, it might be worth a try.
System Support: Some systems are specifically designed to handle mixed ranks. Check your motherboard or server manual for compatibility information.