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Asked: 2018-11-30 11:32:05 +0800 CST

identifying RAM rank of a 32gb PC4-2400 DIMM

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have a RAM DIMM, sticker says samsung 32GB 2Rx4 PC4-2400T-RA1-11-DC0 and I believe the model number is M393A4K40BB1-CRC0Q S

The dimm has chips on both sides, and on a given side it is 2 rows with 5 columns of chips on left and 4 columns of chips on the right; so 18 chips on one side and another 18 chips on the other side.

Is this specific dimm single rank, dual rank, or quad rank? And is there a simple way to visually tell?

The server it goes in has a total of 96 DIMM slots, using 32gb dimms it was running 3.0TB of RAM. For these types of servers today how important is single, dual, or quad rank and why?

when you're dealing with 32gb, 64gb, or 128gb DIMM's now with 24, 48, or uo to 96 DIMM slots, how does single/dual/quad rank come into context? I ask because I thought the "memory controller" can only access so many ranks so 96 dimms at quad rank = too many need dual rank or single rank ?

also looking to gain a better understanding putting all this into context with 32gb dimms or larger that is 288 pin DDR4.

memory

1 Answers

  1. https://www.samsung.com/semiconductor/dram/module/M393A4K40BB1-CRC/

    This shows more detailed info about the memory module. The 2R means it is a dual rank module.

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