HP OMEN 25L Desktop GT12-1xxx

Desktop, from 2021 2 hardware reports
Memory
Up to 48 GB
4 full-size slots
Drives and power
Coming next
Checked from separate sources

Only 2 machines reported so far, so this answer rests on few examples. Check the label or open the panel before you buy.

Upgradable

Yes. 4 slots, up to 48 GB seen working.

It takes DDR4-2133 full-size sticks (DIMM).

Slots
4 DIMM slots
Type
DDR4-2133 288-pin DIMM
Most seen working
48 GB; one machine runs 48 GB
Firmware says
128 GB maximum
How sure
2 of 2 reports show this layout
See 8 GB DDR4-2133 DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 2 hardware reports of this desktop. Sources and method. Updated 9 Nov 2026.

4 full-size slots
Illustration

Questions

Can I upgrade the RAM in the HP OMEN 25L Desktop GT12-1xxx?

Yes. 4 slots, up to 48 GB seen working. It takes DDR4-2133 full-size sticks (DIMM).

What type of RAM does the HP OMEN 25L Desktop GT12-1xxx use?

DDR4-2133 full-size sticks (DIMM, 288-pin).

Is this my desktop?

Check the model name on the front or the label of the case. It should read OMEN 25L Desktop GT12-1xxx.

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