HP Pavilion Gaming Desktop 790-00xx

Desktop, from 2018 5 hardware reports
Memory
Up to 16 GB
4 full-size slots
Drives and power
Coming next
Checked from separate sources
Upgradable

Yes. 4 slots, up to 16 GB seen working.

It takes DDR4-2666 full-size sticks (DIMM).

Slots
4 DIMM slots
Type
DDR4-2666 288-pin DIMM
Most seen working
16 GB in two or more machines; one machine runs 24 GB
Firmware says
64 GB maximum (often wrong, so we show what machines run)
How sure
5 of 5 reports show this layout
See 4 GB DDR4-2666 DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 5 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 Pavilion Gaming Desktop 790-00xx?

Yes. 4 slots, up to 16 GB seen working. It takes DDR4-2666 full-size sticks (DIMM).

What type of RAM does the HP Pavilion Gaming Desktop 790-00xx use?

DDR4-2666 full-size sticks (DIMM, 288-pin).

How much RAM can the HP Pavilion Gaming Desktop 790-00xx take?

Machines in the reports run up to 16 GB, and one runs 24 GB. The firmware reports a maximum of 64 GB, a figure that is often wrong.

Is this my desktop?

Check the model name on the front or the label of the case. It should read Pavilion Gaming Desktop 790-00xx.

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