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February 22nd, 2022 06:00
Memory module SNPTN78YC/32G not recognized on 7920 Tower
Hi, I purchased a 32G memory module update for my Dell 7920 workstation has 2x16G RAM inserted in DIMM1 and DIMM2 slots. The model number is SNPTN78YC/32G. It is listed as compatible hardware for 7920 here.
Unfortunately, when I inserted the memory, it wasn't not recognized and the preboot power code showed a "Memory/RAM failure" (2 amber blinks, followed by 4 white blinks). I tried two different slots: the one just next to one of the already presents RAMs (number and the number 3. The result is the same.
Does anyone have any experience with this model? Thanks.
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DELL-Jesse L
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March 15th, 2022 07:00
Update=Resolved-After installing the 32 GB RAM to another one of DIMM slots. Can now use the existing 4x8 GB RAM + new 32GB for a total of 64 GB RAM.
mazzinia_
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February 22nd, 2022 08:00
Hello,
what you are trying to do is not a supported configuration
https://www.dell.com/support/manuals/en-us/precision-7920-workstation/precision_7920_om_pub/memory-configuration?guid=guid-ce1561c8-88a9-45e3-bc3b-762cbb37e073
According to that, you can use 2 slots ( aka 2 modules ) with 8 and 16 gb modules only
serhannn
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February 22nd, 2022 09:00
Hi, thanks for the information, I wasn't aware of this configuration table.
However, somehow my current configuration doesn't match any of the rows in the table. I have 32GB RAM in total, 2x16GB inserted in DIMM0 and DIMM1. For the two CPU version, which I have, the table shows 4x8GB modules as the only option. Or am I misunderstanding?
mazzinia_
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February 22nd, 2022 10:00
No, you are correct. But with not supported configurations, the trick is that one may work and another may not.
So right now the options are 2 : 1) you got sold faulty 32gb module/s , 2) it's an unsupported configuration that has no chances of working if tried, 3) the modules are not dell oem for this unit ( dell systems can be picky )