|"Tags:Apple Mac mini mc270ll/a desktop computer"|
Apple Mac Mini Intel Core 2 Duo 2.4GHz Computer (MC270LL/A)
Search using your computer make and model on a ram manufacturer's or ram distributor's web site.
E.g. Kingston's web site
Manufacturer - Apple
Model - mini
Apple Mac mini (DDR3) Core 2 Duo 2.4/2.66(Mid 2010)
Your computer has two ram slots, up to 4gb modules can be installed in each slot, for a max of 8gb total.
For brand name ram, once you know which ram module part numbers are listed for (= are compatible with) your computer model, you can buy the module(s) from anywhere you like that has that module part number.
You do not benefit from more ram unless you have programs that actually need it.
Computer memory requirements: How much memory do you need?
Ultimate Memory Guide
How Much Memory Do You Need?
32 bit operating systems have a 4gb virtual memory address limit - they cannot use more than 4gb of ram, and if you install 4gb of ram, the operating system can't actually use all of the 4gb for the operating system and the user. You may have more ram available to the operating system and the user if you install max 3gb total rather than 4gb.