New Max memory for late 2009 iMac

[Miarka]

So the apple website has stopped updating the specs for the iMac (21.5-inch, Late 2009,
3.06 GHz Intel Core 2 Duo) some time ago.
The most recent specs they have for the maximum memory is 4gb per slot and 16gb total.
https://support.apple.com/en-us/ht3912
However,

According to the iRam/Mushkin website, they have a compatible 8gb per slot solution.
This also begs the question of 32gb total? running Sierra 10.12
Below is the model number and related links.
Any thoughts?

MAR3S1067T8G28X2
http://www.iramtechnology.com/index.php/products/find-by-product-line/14-imac-2009

http://www.iramtechnology.com/index.php/component/djcatalog2/item/58-MAR3S1067T8G28X2

 

[redheeler]

Apple has been known to actually underreport the maximum amount of RAM you can put in your Mac. I'm not sure if this applies to the late 2009 Core 2 Duo, but mid 2010 and mid 2011 iMac 21.5" both can accept 32 GB. Maybe someone else can give you a more definite answer on that specific model.

Edit: According to Mactracker/EveryMac this only seems to apply to the mid 2011 21.5". Looks like the earlier 21.5" models do cap at 16 GB.

 

[Miarka]

Apple has been known to actually underreport the maximum amount of RAM you can put in your Mac. I'm not sure if this applies to the late 2009 Core 2 Duo, but mid 2010 and mid 2011 iMac 21.5" both can accept 32 GB. Maybe someone else can give you a more definite answer on that specific model.

Edit: According to Mactracker/EveryMac this only seems to apply to the mid 2011 21.5". Looks like the earlier 21.5" models do cap at 16 GB.

how about if I use just two of the 8gb for a total of 16gb?
Do the slots max out at 4gb?