IBM 82121QG
Only one machine has reported its memory so far, so this answer rests on a single example. Check the label or open the panel before you buy.
Yes. 4 slots, up to 3 GB seen working.
It takes DDR2-533 full-size sticks (DIMM).
- Slots
- 4 DIMM slots
- Type
- DDR2-533 240-pin DIMM
- Most seen working
- 3 GB in the one machine reported
- Firmware says
- 4 GB maximum (often wrong, so we show what machines run)
- How sure
- 1 of 1 report show this layout
Worked out from 1 hardware report of this desktop. Sources and method. Updated 10 Nov 2026.
Check the drive you have.
The reports don't show this model's drive type yet. Look at the drive in it: a 2.5-inch box, about 7 by 10 cm, is SATA. A small stick is M.2, and its label says NVMe or SATA and its length (2230, 2242 or 2280).
- Drive type
- Check your current drive
How to tell a drive's type. Sources and method. Updated 10 Nov 2026.
Illustration Check the label on the power supply.
We don't have this model's power supply rating. It is printed on the supply's sticker, inside the case next to its fan. Prebuilt desktops often use a supply shaped for their case, so match the shape and the plugs as well as the watts.
- Rating
- On the supply's label
How to read a power supply label. Sources and method. Updated 10 Nov 2026.
Illustration It takes processors for the Socket 478 socket.
Processors in the reports: Pentium 4 3.00GHz (1). Prebuilt desktops often only take processors from the generation they shipped with, so stay with the ones listed.
- Socket
- Socket 478
- Seen working
- Pentium 4 3.00GHz
- How sure
- From 1 report
From the processor records in 1 hardware report. Sources and method. Updated 10 Nov 2026.
Illustration Look for a full-length slot.
The reports don't list this model's slots. A graphics card needs a full-length (x16) slot, the longest one, and room in the case.
- x16 slots
- Not listed by the firmware
How to find a graphics card slot. Sources and method. Updated 10 Nov 2026.
Illustration Questions
Can I upgrade the RAM in the IBM 82121QG?
Yes. 4 slots, up to 3 GB seen working. It takes DDR2-533 full-size sticks (DIMM).
What type of RAM does the IBM 82121QG use?
DDR2-533 full-size sticks (DIMM, 240-pin).
How much RAM can the IBM 82121QG take?
Machines in the reports run up to 3 GB. The firmware reports a maximum of 4 GB, a figure that is often wrong.
What processor can I put in the IBM 82121QG?
It takes processors for the Socket 478 socket. Processors in the reports: Pentium 4 3.00GHz (1). Prebuilt desktops often only take processors from the generation they shipped with, so stay with the ones listed.