System76 Thelio Major
Desktop, from 2019 6 hardware reports
Memory
Up to 128 GB
8 full-size slots
Drives and power
Coming next
Checked from separate sources
2 of 6 machines sold under this name show 4 slots instead of 8. That is usually the smaller case. Count the slots inside yours before you buy.
Upgradable
Yes. 8 slots, up to 128 GB seen working.
It takes DDR4-2133 full-size sticks (DIMM).
- Slots
- 8 DIMM slots
- Type
- DDR4-2133 288-pin DIMM
- Most seen working
- 128 GB in two or more machines
- Firmware says
- 512 GB maximum (often wrong, so we show what machines run)
- How sure
- 4 of 6 reports show this layout
See 16 GB DDR4-2133 DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 6 hardware reports of this desktop. Sources and method. Updated 9 Nov 2026.
8 full-size slots
Illustration Questions
Can I upgrade the RAM in the System76 Thelio Major?
Yes. 8 slots, up to 128 GB seen working. It takes DDR4-2133 full-size sticks (DIMM).
What type of RAM does the System76 Thelio Major use?
DDR4-2133 full-size sticks (DIMM, 288-pin).
How much RAM can the System76 Thelio Major take?
Machines in the reports run up to 128 GB. The firmware reports a maximum of 512 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 Thelio Major.