Fujitsu Primergy TX1310 M3 - RAM Upgrade

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I want to upgrade the RAM on my home server:

Fujitsu Primergy TX1310 M3
CPU: Intel Xeon E3-1225 v6 @ 3.30 GHz
RAM: 16 GB
Hard Drive: 2 x 1TB

I want to add a 16GB chip to take it up to 32GB total.

Crucial recommends the only following option:
Micron 16GB DDR4-3200 VLP ECC UDIMM 2Rx8 CL22.
Density: 16GB
Speed: DDR4-3200

This memory chip that Crucial have recommended is end of life. I'm not that experienced with PC/server building, it's proving hard to find this exact one.
Will any memory work that matches this speed and density or are there any other factors to take into consideration?

The current RAM I have installed is this:
2 x 8 GB SK Hynix DDR4-2400T modules (model HMA81GU7AFR8N-UH)

These have a marker saying 1Rx8. What does the 1Rx8 signify on my existing 8 GB SK Hynix RAM chips? And why does Crucial recommend a different one that is 2Rx8 ? What does this number signify?

Does anyone have a link to a RAM chip that would be suitable?
 
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These have a marker saying 1Rx8. What does the 1Rx8 signify on my existing 8 GB SK Hynix RAM chips? And why does Crucial recommend a different one that is 2Rx8 ? What does this number signify?
This DDR4 stick uses 8Gbit dies, in a single rank. This is typical for 8GB sticks, though 16Gbit dies do exist for 8GB (with just 4 memory chips).

A 16GB stick which is 2Rx8 has two ranks of 8Gbit dies and this is strongly recommended for 6th/7th gen PCs (yours is 7th gen).

Many 16GB DDR4 sticks are now single rank using 16Gbit dies and this might be incompatible with your PC (Kingston advises you only use them for 8th gen or later).

Does anyone have a link to a RAM chip that would be suitable?
Almost all are end of life now, so you're going to find it tricky. Kingston, Samsung and Micron all sold unbuffered ECC. You can get part numbers if you google "unbuffered ecc ddr4 part numbers", though do double check because unbuffered and registered and ecc and non-ecc get mixed up and mislabelled a lot.
 
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This DDR4 stick uses 8Gbit dies, in a single rank. This is typical for 8GB sticks, though 16Gbit dies do exist for 8GB (with just 4 memory chips).

A 16GB stick which is 2Rx8 has two ranks of 8Gbit dies and this is strongly recommended for 6th/7th gen PCs (yours is 7th gen).

Many 16GB DDR4 sticks are now single rank using 16Gbit dies and this might be incompatible with your PC (Kingston advises you only use them for 8th gen or later).


Almost all are end of life now, so you're going to find it tricky. Kingston, Samsung and Micron all sold unbuffered ECC. You can get part numbers if you google "unbuffered ecc ddr4 part numbers", though do double check because unbuffered and registered and ecc and non-ecc get mixed up and mislabelled a lot.

Is this what I am looking for:
 
Is this what I am looking for:
From what I can see, that is an equivalent spec, yes, but even with rising memory prices £120 for just 16GB is outrageous.

How many slots do you have free on the board? If you have four, I'd consider buying another pair (used) of what you own already (HMA81GU7AFR8N-UH).
 
I’ll point out I’ve never used TX1310 M3 so I’m not familiar with it, but it seems it’s a C24* series chipset which is a rebranded C23* that I am familiar with. So making the assumption NON ECC will work just fine, is the server used for anything critical, do you actually need ECC? If you don’t need ECC, you might be able save a lot of money with non ECC memory.
 
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