Can I take my computer into an Apple store and have more RAM installed?
Mac Pro
No, but you can buy it yourself (I recommend crucial.com), take it to a technician and have them install it. Or you can install it yourself - it's very simple in a Mac Pro.
Matt
It is totally up to you but installing RAM is easy DIY and you would pay 3x what it costs to buy it yourself.
https://support.apple.com/manuals/#macpro
How to remove or install memory in Mac Pro
http://support.apple.com/kb/HT4433
http://eshop.macsales.com/shop/memory/Mac-Pro-Memory
This is what I use in MacPro1,1 (4 x 2GB) $110/8GB
http://www.amazon.com/BUFFERED-PC2-5300-FB-DIMM-APPLE-Memory/dp/B002ORUUAC/
plus 4 x 1GB I had.
how to add more ram
