RAM upgrade HP elitebook 840 G9

[chaiwkste123]

my note book is 16GB, i want to upgrade to 64 is that possible?

[NonSequitur777]

@chaiwkste123,

Welcome to our HP Community Forum!

Yes, you can upgrade up to 2 x 32GB of DDR5 PC5-38400, 4800 MHz, Non-ECC, Unbuffered, SODIMM, 262-pin RAM modules.

Reference: HP - Compaq EliteBook 840 G9 | Memory RAM & SSD Upgrades | Crucial.com.

Kind Regards,

NonSequitur777

[chaiwkste123]

i was recommended to buy 13L73R4 HP 32GB DDR4 3200 SODIMM vs  DDR5 PC538400 4800 MHz? is that is big difference?

[chaiwkste123]

Thank you very much. My company IT recommended DD4 instead of DD5. Any different?

[chaiwkste123]

DDR4 vs DDR5? Sorry typo error 

[NonSequitur777]

@chaiwkste123,

Well, DDR4 memory modules are not compatible with DDR5 motherboards, and vice versa. DDR4 and DDR5 are different generations of RAM with distinct physical and electrical characteristics, which means they are not interchangeable.

Meaning, your laptop either fits DDR5 or DDR4 RAM, but not both.

Let's find out exactly what system you got:  type system information in your Windows search bar, and click on the System Information App.  You should see something like this, using my desktop:

Please provide your "System Model", "System SKU", and your "BaseBoard Product" numbers.

Kind Regards,

NonSequitur777

[chaiwkste123]

System model: HP EliteBook 840 14 inch G9 Notebook PC

System SKU: 78C35UC#AB4

BaseBoard Product : 8ABB

[NonSequitur777 · Accepted solution]

@chaiwkste123,

Thank you, your BaseBoard Product (SSID: 8ABB) and your System SKU number (see: HP PartSurfer) both confirm that your laptop is fitted with DDR5 RAM, not DDR4.

Repeat: you cannot install DDR4 RAM.

Kind Regards,

NonSequitur777