-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
- HP Community
- Desktops
- Business PCs, Workstations and Point of Sale Systems
- Z420 Memory upgrade: single rank & dual rank compatibility

Create an account on the HP Community to personalize your profile and ask a question
10-07-2019 02:08 AM
Hello,
I have a Z420 v1 Xeon 1620v0 with 16GB RAM 4x4GB Micron 12800E MT18JSF51272AZ - 1G6M1ZG 2Rx8.
I want to add another 16GB and I found at a good price 4x4GB Hynix 14900E HMT451U7AFR8C - RD TA AD 1Rx8.
The question I have is will they will work ok even if they are different rank configurations ?
Thank you !
Solved! Go to Solution.
Accepted Solutions
10-07-2019 08:50 AM
you can use different rank configurations as long as each memory bank is using the same rank modules but it's not a HP recomended/supported configuration
IE- all black sockets for cpu-1 must be the same rank and all white sockets of cpu-2 must match in rank type
then do the same for cpu-2 (if applicable)
https://www.levnapc.cz/ProductsFiles/hp-workstation-Z420-technicke-specifikace.pdf
10-07-2019 08:50 AM
you can use different rank configurations as long as each memory bank is using the same rank modules but it's not a HP recomended/supported configuration
IE- all black sockets for cpu-1 must be the same rank and all white sockets of cpu-2 must match in rank type
then do the same for cpu-2 (if applicable)
https://www.levnapc.cz/ProductsFiles/hp-workstation-Z420-technicke-specifikace.pdf