RAM compatibility

[m2-goeldi]

Product specifications

Product name

HP EliteDesk 800 G4 Tower WKS 4RX15EA

Product number

4RX15EA

UNSPSC code

43211515

Memory

16 GB DDR4-2666 MHz ECC RAM (1 x 16 GB) Transfer rates up to 2666 MT/s.

Memory Slots

4 DIMM

Motherboard Specs:


I tried adding a 16GB 1RX4 PC4-2400T-RC1-11 RAM but my Desktop starts beeping and blinking red.
I can't even put only the new RAM in, so my conclusion:
The RAM isn't compatible with the motherboard.
But why? I can't find any hints?

[Paul_Tikkanen · Accepted solution]

Hi:

Your PC only supports non-ECC memory.

HP PartSurfer

You want a memory chip like this one:

The 3200 MHz memory will automatically bridge to 2666 Mhz.

Crucial 16GB DDR4-3200 UDIMM | CT16G4DFRA32A | Crucial.com

[m2-goeldi]

How could i have known this?
I didn't find any information for non-ECC and ECC.
Is it normally specifically written when ECC is supported?

[Paul_Tikkanen]

I didn't see anything on any HP advertising, which is unusual.

HP Elite 800 G4 Business Desktop Business PCs

It just indicated DDR4-2666 MHz.

I just happen to know that no HP Elitedesk PC supports ECC memory.

Only most of the HP business workstation desktop PC's support ECC memory.

The service manual indicates non-ECC memory.

Maintenance and Service Guide HP EliteDesk 800 G4 SFF Business PC

Chapter 2, page 6.

Memory module (UDIMM, non-ECC, 1.2v, PC4-2666)
16-GB
8-GB
4-GB