SM X10SRi-F Memory upgrade recommendation

[AVSION]

Hi All,

Its time to upgrade my FN memory but i'm a bit confused as the information from SM is not clear. on SM MB page it say that my MB supports up to 1TB LRDIMM and 512GB RDIMM however when downloading the manual its half of the specs compare to the website, up to 512TB LRDIMM and 256GB RDIMM. is that to do with the MB version, if so what is the specs i should follow? my model is REV:1.01B.

I have ESXi/FreeNAS AIO system (see below specs in my signature) that i use to run VMs that require lot of memory. i would like to buy now the right memory of size so i wont be limited in the future if i like to upgrade. At the moment i have 2 x 16GB Crucial/Micron CT16G4RFD424A RDIMM modules. at this point i would like to go upto 128GB or 256GB if possible but maybe have the option 1TB in the future. what will be the best way to go LRDIMM or RDIMM? what size should i choose? can i use my current modules and mix with the new size?

Our IT Supplier has the following Crucial/Micron on stock:

DDR4 ECC RDIMM - SERVER

CT16G4RFD4266 - CRUCIAL 16GB DDR4 ECC REG MEMORY, PC4-21300, 2666MHz, DRx4, 835955-B21, LIFE WTY

CT32G4RFD4266 - CRUCIAL 32GB DDR4 ECC REG MEMORY, PC4-21300, 2666MHz, DRx4, 815100-B21, LIFE WTY

CT64G4YFQ426S - CRUCIAL 64GB DDR4 ECC REG MEMORY, PC4-21300, 2666MHz, QRx4, 288PIN, LIFE WTY

CT128G4YFE426S - CRUCIAL 128GB DDR4 ECC REG MEMORY, PC4-21300, 2666MHz, QRx4, 288PIN, LIFE WTY

Last question that is related to the above, in the IPMI hardware section my module are 2400MHz but the operating speed is 2133MHz, is that something i need to consider as well and can i maximise the speed to 2400MHz?

Thank you

 

[Jessep]

I have that board and just bought new RAM, so I should be able to help.

LR is load reduced, you can not mix Registered and Load Reduced. 3DS is another technology (master/slave) that allows double the ram dies to be addressed.

Basically what you want to take away from the Supermicro page is:
Registered max RAM: 256GB with 8x32GB RDIMMs
LR max RAM: 512GB with 8x64GB LRDIMMs

E5 V3 and V4 use 4 channel memory, so get at least 4 DIMMs for performance.

https://www.crucial.com/usa/en/compatible-upgrade-for/Supermicro/x10sri-f

This is the direct link for your motherboard and compatible memory from Crucial. You can go higher in memory speed as they can clock down. Get the highest speed so you can re-use it in future builds, for instance I bought 2933 when I need 2133 as it's the same price.

https://www.crucial.com/usa/en/x10sri-f/CT9408067

This is the only listed 64GB LRDIMM at $379 each.

DDR5 will be coming out late 2019 or early 2020, it wont reach switch over until 2021 at least. History says at that point DDR4 will start to get expensive for awhile until tons of it get dumped on the market and it becomes as cheap as DDR3 is now. This is for server memory. So plan your purchases accordingly.

 

[Jessep]

The 128GB DIMMs are over $5000 each, you would be much better suited to buy a different motherboard or a whole new server to be able to use more memory.

As I said if you buy 2933 RAM you could move it to a new Xeon Scalable Processor V2 system in the future.
2666 would work in a SP v1 system.

Also for heave RAM workloads get a board with 12 DIMM slots.

If this is for business use it would make more sense to get a Dell with proper warranty etc.

 

[AVSION]

I have that board and just bought new RAM, so I should be able to help.

LR is load reduced, you can not mix Registered and Load Reduced. 3DS is another technology (master/slave) that allows double the ram dies to be addressed.

Basically what you want to take away from the Supermicro page is:
Registered max RAM: 256GB with 8x32GB RDIMMs
LR max RAM: 512GB with 8x64GB LRDIMMs

E5 V3 and V4 use 4 channel memory, so get at least 4 DIMMs for performance.

https://www.crucial.com/usa/en/compatible-upgrade-for/Supermicro/x10sri-f

This is the direct link for your motherboard and compatible memory from Crucial. You can go higher in memory speed as they can clock down. Get the highest speed so you can re-use it in future builds, for instance I bought 2933 when I need 2133 as it's the same price.

https://www.crucial.com/usa/en/x10sri-f/CT9408067

This is the only listed 64GB LRDIMM at $379 each.

DDR5 will be coming out late 2019 or early 2020, it won't reach switch over until 2021 at least. History says at that point DDR4 will start to get expensive for awhile until tons of it get dumped on the market and it becomes as cheap as DDR3 is now. This is for server memory. So plan your purchases accordingly.

Hi @Jessep,

Thank you for the your help its now much clearer. looks like LRDIMM 64GB is a good future proof option, will see if i can find a good deal otherwise will go RDIMM 32GB. Can you mix module sizes and speed? if so what is the proper way tp populate them?

ATM i have 2 x 16GB 2400MHz which is the max speed this MB supports however operational speed is 2133MHz, how can i maximize the speed to 2400MHz?

 

[Jessep]

Memory speed is determined by CPU and number of DIMMs per memory channel.

(1) DIMM per memory channel is your best bet.