In a recent engadget article, Jon Fingas points out the following:
If you're planning to snag the new Mac mini and load it up with aftermarket memory, you may want to reconsider your strategy. Macminicolo owner Brian Stucki (among others) has discovered that the RAM in Apple's latest tiny desktop isn't upgradable, much as you'd expect with the company's laptops and the 21-inch iMac.
(Score: 2) by urza9814 on Tuesday October 21 2014, @12:57PM
...so if they don't solder the RAM directly to the board...nobody ever has to install it or something?
They've gotta install the RAM at the factory anyway. Whether it's a fixed amount of four different options, it's still the same basic process. Might now take a couple seconds extra per laptop, from somebody making a couple bucks a day, but it saves a minute or two per laptop from somebody making ten or twenty bucks an hour if they were really having them customized at the Apple stores...
But in fact if you look at the sales page for the mac mini...they have four options. These options have differences in RAM -- but also in CPU, battery, display, and storage. They're not giving people more options, they're giving them *fewer*. They have *less* to keep in inventory and less to assemble. You can't throw 8GB of RAM in with the 2.5GHz processor anymore. If you want 8GB of RAM, you're forced to buy the 2.6GHz CPU.