• ×
    Information
    Windows update impacting certain printer icons and names. Microsoft is working on a solution.
    Click here to learn more
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
  • ×
    Information
    Windows update impacting certain printer icons and names. Microsoft is working on a solution.
    Click here to learn more
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
Guidelines
Any failures related to Hotkey UWP service? Click here for tips.
HP Recommended
Z840
Ubuntu LTS

Hello HP Community,

 

I have a working HP Z840.  I went to install some new RAM and now I am getting no start and 5 beeps.  After pulling the RAM I have 4 sticks of 8GB 1Rx8 PC4-2400T-RD1-11 and 12 sticks of 8GB 1Rx4 PC4-2133P-RC0-10.  I would think these are compatible?  Any thoughts on why I am getting no boot with these sticks?

 

Thank you!

 

IMG_20211209_151337-2.jpg

1 ACCEPTED SOLUTION

Accepted Solutions
HP Recommended

hi

 

likely incompatible

 

4GB DDR4-2133 ECC Registered RAM
8GB DDR4-2133 ECC Registered RAM
16GB DDR4-2133 ECC Registered RAM
32GB DDR4-2133 ECC Load Reduced (LR) RAM
note:
Identical memory components are used to build the CTO configurations as are available as After Market Options (AMO). The AMO Option Kit Part # are shown alongside the memory DIMMs.
For details on the supported memory configurations on the HP Z840 Workstation, please refer to the System Technical Specifications - System Board section of this document.
DIMMs should be equally distributed across all four memory channels for optimal performance.
Each processor supports up to 4 channels of DDR4 memory. To realize full performance at least 1 DIMM must be inserted into each channel.
The CPUs determine the speed at which the memory is clocked. For example, if a 1600MHz capable CPU is used in the system, the maximum speed the memory will run at is 1600MHz regardless of the specified speed of the memory.
You cannot intermix LR DIMMs with Registered DIMMs. The system will not work.
Maximum memory capacities assume Windows 64-bit operating systems or Linux. With Windows 32-bit operating
systems, memory above 3 GB may not all be available due to system resources.

check the frequency and possibilities with the document, in addition to the modules indicated compatible

HP Z440, Z640, and Z840 Workstation Series - Maintenance and Service Guide

 

 

--------------------------------------------- Signature ---------------------------------------------
was this reply helpful , or just say thank you ? Click on the yes button

Please remember to mark the answers this can help other users
please click on the accept as solution button if message provided an answer to the problem




Desktop-Knowledge-Base
Windows 11 22h2 inside , user

------------------------------------------------------------------------------------------------------------

View solution in original post

2 REPLIES 2
HP Recommended

hi

 

likely incompatible

 

4GB DDR4-2133 ECC Registered RAM
8GB DDR4-2133 ECC Registered RAM
16GB DDR4-2133 ECC Registered RAM
32GB DDR4-2133 ECC Load Reduced (LR) RAM
note:
Identical memory components are used to build the CTO configurations as are available as After Market Options (AMO). The AMO Option Kit Part # are shown alongside the memory DIMMs.
For details on the supported memory configurations on the HP Z840 Workstation, please refer to the System Technical Specifications - System Board section of this document.
DIMMs should be equally distributed across all four memory channels for optimal performance.
Each processor supports up to 4 channels of DDR4 memory. To realize full performance at least 1 DIMM must be inserted into each channel.
The CPUs determine the speed at which the memory is clocked. For example, if a 1600MHz capable CPU is used in the system, the maximum speed the memory will run at is 1600MHz regardless of the specified speed of the memory.
You cannot intermix LR DIMMs with Registered DIMMs. The system will not work.
Maximum memory capacities assume Windows 64-bit operating systems or Linux. With Windows 32-bit operating
systems, memory above 3 GB may not all be available due to system resources.

check the frequency and possibilities with the document, in addition to the modules indicated compatible

HP Z440, Z640, and Z840 Workstation Series - Maintenance and Service Guide

 

 

--------------------------------------------- Signature ---------------------------------------------
was this reply helpful , or just say thank you ? Click on the yes button

Please remember to mark the answers this can help other users
please click on the accept as solution button if message provided an answer to the problem




Desktop-Knowledge-Base
Windows 11 22h2 inside , user

------------------------------------------------------------------------------------------------------------
HP Recommended

The 2400 RAM does work when used alone.  Surprising to me that they are not compatible together. 

† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.