Apple iMac (17-inch and 20-inch, Early 2006)
Model identifier iMac4,1 All-in-one, from 2006 8 hardware reports
Upgradable
Yes. 2 slots, up to 2 GB seen working.
It takes DDR2-667 laptop-size sticks (SO-DIMM).
- Slots
- 2 SO-DIMM slots
- Type
- DDR2-667 200-pin SO-DIMM
- Most seen working
- 2 GB in two or more machines
- Firmware says
- 4 GB maximum (often wrong, so we show what machines run)
- How sure
- 3 of 3 reports show this layout
See 8 GB DDR2-667 SO-DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 3 hardware reports of this desktop, with Apple's memory specifications for which Macs have sockets. Sources and method. Updated 10 Nov 2026.
2 laptop-size slots
Illustration Questions
Can I upgrade the RAM in the Apple iMac (17-inch and 20-inch, Early 2006)?
Yes. 2 slots, up to 2 GB seen working. It takes DDR2-667 laptop-size sticks (SO-DIMM).
What type of RAM does the Apple iMac (17-inch and 20-inch, Early 2006) use?
DDR2-667 laptop-size sticks (SO-DIMM, 200-pin).
How much RAM can the Apple iMac (17-inch and 20-inch, Early 2006) take?
Machines in the reports run up to 2 GB. The firmware reports a maximum of 4 GB, a figure that is often wrong.
Is this my desktop?
On the Mac, choose Apple menu > About This Mac > System Report. The Model Identifier should read iMac4,1.
More in the Apple iMac
- iMac (21.5-inch, Mid 2011) (iMac12,1)
- iMac (27-inch, Mid 2011) (iMac12,2)
- iMac (20-inch and 24-inch, Mid 2007) (iMac7,1)
- iMac (20-inch and 24-inch, Early 2008) (iMac8,1)
- iMac (21.5-inch and 27-inch, Late 2009) (iMac10,1)
- iMac (20-inch and 24-inch, Early and Mid 2009) (iMac9,1)
- iMac (27-inch, Late 2013) (iMac14,2)
- iMac (21.5-inch, Late 2013) (iMac14,1)
- iMac (Retina 5K, 27-inch, 2017) (iMac18,3)
- iMac (21.5-inch, Mid 2010) (iMac11,2)
- iMac (Retina 4K, 21.5-inch, 2017) (iMac18,2)
- iMac (27-inch, Mid 2010) (iMac11,3)