ASRock K10N78D

Motherboard, from 2009 10 hardware reports
Memory
Up to 8 GB
4 full-size slots
SSD slots
Coming next
Checked from separate sources
Upgradable

Yes. 4 slots, up to 8 GB seen working.

It takes DDR2-400 full-size sticks (DIMM).

Slots
4 DIMM slots
Type
DDR2-400 240-pin DIMM
Most seen working
8 GB in two or more machines
Firmware says
8 GB maximum
How sure
10 of 10 reports show this layout
See 8 GB DDR2-400 DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 10 hardware reports of this motherboard. Sources and method. Updated 9 Nov 2026.

4 full-size slots
Illustration

Questions

Can I upgrade the RAM in the ASRock K10N78D?

Yes. 4 slots, up to 8 GB seen working. It takes DDR2-400 full-size sticks (DIMM).

What type of RAM does the ASRock K10N78D use?

DDR2-400 full-size sticks (DIMM, 240-pin).

How much RAM can the ASRock K10N78D take?

Machines in the reports run up to 8 GB. That matches the 8 GB maximum the firmware reports.

Is this my motherboard?

The model name is printed on the board, usually between the memory slots or near the CPU socket. In Windows, open System Information and look at "BaseBoard Product"; it should read K10N78D.