[SOLVED] Ram for an old HP Z400 workstation

[silversmithy]

Hello. I have an old HP Z 400 workstation, and need to add a lot more ram as it only came with (3) 1gb sticks. The current sticks are HP part number HP 500208-563. I have researched this and some are saying this is registered ram, and others not. I thought this machine only took unregistered memory so it is odd. Clarification would be very helpful. Thank you.

 

[SamirD]

HP sometimes had ram that worked outside of the official specs. Unfortunately the HP part number you posted doesn't have any clear information either as I can't find an actual picture of this module.

What is the "PC3..." description on your existing ram?

 

[Nemesia]

The HP Z 400 workstation is a XEON system.

https://support.hp.com/ca-en/document/c01709672

https://support.hp.com/ca-en/document/c01747797

Z400 Archives

Get guaranteed compatible Workstation Z400 memory upgrade module option replacements configured to factory originals just like HP uses @Memory.NET!

memory.net

That system use this kind of RAM below.
DDR3-1333 ECC UDIMM PC3-10600E Dual Rank

 

[silversmithy]

HP sometimes had ram that worked outside of the official specs. Unfortunately the HP part number you posted doesn't have any clear information either as I can't find an actual picture of this module.

What is the "PC3..." description on your existing ram?

PC3-10600E. Thanks.

 

[Nemesia]

https://www.amazon.com/s?k=DDR3-1333+ECC+UDIMM+PC3-10600E+2Rx8&ref=nb_sb_noss

 

[silversmithy]

The HP Z 400 workstation is a XEON system.

https://support.hp.com/ca-en/document/c01709672

https://support.hp.com/ca-en/document/c01747797

Z400 Archives

Get guaranteed compatible Workstation Z400 memory upgrade module option replacements configured to factory originals just like HP uses @Memory.NET!

memory.net

That system use this kind of RAM below.
DDR3-1333 ECC UDIMM PC3-10600E Dual Rank

Yes, thank you. That mostly describes the ram that is in there except it does not clarify U or R. Most places I have looked online show it as registered memory, but again I cannot get a definitive answer, and from my other research the later model z400 with the 6 dimm slots only takes unbuffered... Very odd.

 

[silversmithy]

I believe it is a Micron Dimm... Here is the other number on it: MT9JSF12872AZ-1G4G1ZG. Not sure if this helps at all.

 

[Nemesia]

I have no idea what's going on here.

From the manual - http://www.hp.com/canada/products/landing/workstations/files/13276_na.pdf
NOTE: Only unbuffered DDR3 DIMMs are supported.

But the stick you linked is registered. So....no clue.

 

[SamirD]

The HP Z 400 workstation is a XEON system.

https://support.hp.com/ca-en/document/c01709672

https://support.hp.com/ca-en/document/c01747797

Z400 Archives

Get guaranteed compatible Workstation Z400 memory upgrade module option replacements configured to factory originals just like HP uses @Memory.NET!

memory.net

That system use this kind of RAM below.
DDR3-1333 ECC UDIMM PC3-10600E Dual Rank

Not always--my z420 uses a xeon and is using registered memory no problem. It depends on the motherboard and it's limitations as most xeon processors support ecc reg.

 

[SamirD]

PC3-10600E. Thanks.

This would be the type of memory that would definitely work since that's what you already have. 8GB modules are as large as they come and with 6 slots, your max would be 48GB.

 

[silversmithy]

Thank you both very much for your help. Can you let me know what motherboard your Z420 has? It would be great if the one I have would also be able to utilize registered ram as it is more cost effective. Thanks again.

 

[SamirD]

Thank you both for your help!!! Can you let me know what motherboard you have in your Z420? I would like to see if registered ram may work with my Z400 as it is more cost effective. Thanks again!

I don't know if the z420 will be a direct swap to the z400 as they were different sockets. I have the older bootblock version 1 motherboard, but I don't know what the exact part number is. I found the following part numbers on hp partsurfer and I'd look at the pictures in ebay listings to see which one might be the same as what I have:
619557-001
619557-601
708615-001
708615-601