Is this RAM compatible with my 21.5" iMac?

[jtaypharmd]

Found this on Newegg.com for $69.99 and was considering adding it to the 4 GB already installed in my late-2009 model 21.5" iMac. It looks different than other sticks that I know are compatible, so I was just concerned it would not work. New to adding RAM... any advice?

G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-8GBXL

 

[xpipe]

Your concerns are well-founded.

 

[jtaypharmd]

So that's a big fat no, then?

 

[xpipe]

Big fat no...the iMac uses laptop RAM!

 

[jtaypharmd]

Thanks for your help.

 

[xpipe]

Just get it here...no muss, no fuss: http://eshop.macsales.com/shop/apple/memory/iMac


It's comparably priced to the RAM you were considering. But why stop at 8GB? Go big or go home

 

[jtaypharmd]

Would this one work?

G.SKILL 4GB 204-Pin DDR3 SO-DIMM DDR3 1066 (PC3 8500) Laptop Memory Model F3-8500CL7S-4GBSQ

 

[xpipe]

Oops, it's not really comparably priced. I thought you were going from 4 to 8. Anyway, they have my extremely strong recommendation. If you want to get it somewhere else, just look up the specs on the page I linked. That G.Skill laptop RAM you posted is what's in the 2009 iMac, but slower than that in the 2010 iMac.