The size of ram I'm talking about are 4GB or 8Gb SINGLE modules. Most of the boards I've found support six slots so 4 x 6 = 24GB or 8 x 6 = 48GB.

The cost lies with size of the module and its specs. Some single 8GB modules, DDR2-PC6400, 4-4-4-12, low voltage apprx 1.6-1.8 volts run $1000-$1600 each. That's a lot of money in anyone's book.

That single module can buy you a decent computer already.

I say skip it and stick to 6-8 gigs. Then again, if you got a couple grand burning a hole in your pocket, that's a good place to stick it.