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‎12-28-2021 09:51 AM

HP Recommended
Product: HP Z840 Workstation
Operating System: Microsoft Windows 10 (64-bit)

 

 

I have 8 LRDIMMs of 32 GB and I want these configured on the motherboard of  my HP Z840 workstation. According to the manual is that for both CPUs (0 and 1) on locations DIMM 1, 3, 6, 8. But when I use the places 3, and/or 6 on CPU1, I get red light and beeps. The other 6 positions give no problem, only on DIMM 3 and 6 for CPU1.

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1 REPLY 1

‎12-28-2021 05:30 PM - edited ‎12-28-2021 05:33 PM

HP Recommended

Types of memory supported on an HP Z840 are:

 

• 32 GB, 64 GB, and 128 GB PC4-2133R 2133 MHz LR DIMMs supported on Intel® Haswell (v3) processors

 

the broadwell (v4) cpu's are not listed as a approved config for broadwell (v4) cpu's

 

 

1,3,6,8 is for a SINGLE OR DUAL CPU config using "LR" Load Reducing a  v3 Haswell (v3) processor

 

https://zworkstations.com/site/assets/files/1044/hp-z840-technical-white-paper.pdf  (page 23)

 

https://www.itcreations.com/user-manuals/z840/memory-performance-on-hp-z840-workstations.pdf

 

https://manualzz.com/doc/o/rxdmf/hp-z840-workstation-memory-configurations-and-optimization

 

if swapping dimms between the memory banks to check for a bad dimm does not show any difference, then you may have a bad cpu (memory ctrl is in cpu) bad cpu socket (pins not contacting cpu [pads) or bad motherboard

 

 

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