HP Compaq 505B Microtower PC
Desktop, from 2009 3 hardware reports
Memory
Up to 3 GB
2 full-size slots
Drives and power
Coming next
Checked from separate sources
Upgradable
Yes. 2 slots, up to 3 GB seen working.
It takes DDR3-1066 full-size sticks (DIMM).
- Slots
- 2 DIMM slots
- Type
- DDR3-1066 240-pin DIMM
- Most seen working
- 3 GB; one machine runs 3 GB
- Firmware says
- 4 GB maximum
- How sure
- 2 of 3 reports show this layout
See 8 GB DDR3-1066 DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 3 hardware reports of this desktop. Sources and method. Updated 9 Nov 2026.
2 full-size slots
Illustration Questions
Can I upgrade the RAM in the HP Compaq 505B Microtower PC?
Yes. 2 slots, up to 3 GB seen working. It takes DDR3-1066 full-size sticks (DIMM).
What type of RAM does the HP Compaq 505B Microtower PC use?
DDR3-1066 full-size sticks (DIMM, 240-pin).
Is this my desktop?
Check the model name on the front or the label of the case. It should read Compaq 505B Microtower PC.