huge markups on cheap hardware leads to profits, Slate reports.
Example: http://www.ubuntu.com/partners/dell
The biggest drag on PC profits is paying the heavy Microsoft tax on every unit sold.
Also crapware makes your product seem crappier, so you have to drop the price to remain competitive. I'm not sure there's much to gain from it despite how prevalent it is.
Apple's memory prices are somewhere between Dell's consumer prices and Dell's server prices.
I just buy the model with the less RAM and upgrade myself, in some models it's covered in the instructions and are not too hard to upgrade.