HP KJ377AA-ABA m8400f
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 8 GB seen working.
It takes DDR2-800 full-size sticks (DIMM).
- Slots
- 4 DIMM slots
- Type
- DDR2-800 240-pin DIMM
- Most seen working
- 8 GB in the one machine reported
- Firmware says
- 16 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 940 socket.
Processors in the reports: Phenom 9500 (1). Prebuilt desktops often only take processors from the generation they shipped with, so stay with the ones listed.
- Socket
- Socket 940
- Seen working
- Phenom 9500
- How sure
- From 1 report
From the processor records in 1 hardware report. Sources and method. Updated 10 Nov 2026.
Illustration People run graphics cards in this desktop.
Cards in the reports: Quadro FX 380 (1).
- Seen working
- Quadro FX 380
From 1 PCI device reports. Sources and method. Updated 10 Nov 2026.
Illustration Questions
Can I upgrade the RAM in the HP KJ377AA-ABA m8400f?
Yes. 4 slots, up to 8 GB seen working. It takes DDR2-800 full-size sticks (DIMM).
What type of RAM does the HP KJ377AA-ABA m8400f use?
DDR2-800 full-size sticks (DIMM, 240-pin).
How much RAM can the HP KJ377AA-ABA m8400f take?
Machines in the reports run up to 8 GB. The firmware reports a maximum of 16 GB, a figure that is often wrong.
What processor can I put in the HP KJ377AA-ABA m8400f?
It takes processors for the Socket 940 socket. Processors in the reports: Phenom 9500 (1). Prebuilt desktops often only take processors from the generation they shipped with, so stay with the ones listed.
Can I add a graphics card to the HP KJ377AA-ABA m8400f?
People run graphics cards in this desktop. Cards in the reports: Quadro FX 380 (1).
Is this my desktop?
Check the model name on the front or the label of the case. It should read KJ377AA-ABA m8400f.