Recently, we informed you that Apple had released a new, cheaper iMac that cost $200 less than its predecessors. That is all still true, although it turns out that Apple has made a couple of changes to the standard design, as OWC (Other World Computing) presented in its Rocket Yard blog.
As it turns out, the RAM on this $1099 iMac is not user-upgradeable. Despite the difficulty you'll have accessing it, even if you get to it, you'll find that the RAM is soldered to the PCB. The standard configuration is 8 GB of DDR3-1600 memory. In the online configurator, you also cannot upgrade this – 8 GB is the only option you have.
Granted, most users who need more memory will also want more CPU power, therefore choosing another model, but for the tiny crowd that might be interested in more memory, this might be a small nuisance.
We suspect that this was done to lower the production costs, as the only customizable part in the machines is the storage. Due to this, the motherboard (or what Apple likes to call a Logic Board) in all of the $1099 iMacs will be identical, making them cheaper to mass produce.