On the Macintosh: RAM Upgrades
If you’re familiar with the basics of buying and installing RAM on the PC, you’ll have no trouble doing so on a Macintosh. In fact, you’ll find it far simpler to buy RAM for your Macintosh; you have far fewer variables to contend with.
What kind to buy. As with PCs, different models of Macs accept different types of SIMMs (30-pin in older Macs, 72-pin in newer models) or DIMMs, different speeds of RAM, different voltages, and so on.
To discover what kind of RAM upgrade boards your particular Macintosh model needs, consider downloading GURU, short for “GUide to RAM Upgrades.” Released as freeware by RAM vendor NewerRAM, Inc., GURU is a database of information about every Macintosh model. Using GURU, you can determine everything you need to know about what RAM you should buy for a given Macintosh model, how much RAM that Macintosh can hold, what RAM speeds it supports, and whether the Macintosh supports memory interleaving (a method of increasing speed that requires you install RAM in specific slots). You can download GURU from http://www.newertech.com/software/guru.html; revised versions regularly appear, covering newly released Macintosh models.
If you’re researching Macintosh memory upgrades from your PC, you can find much of the same information at http://www.newerram.com/findmem.html.
How much RAM to buy. Even with the information from GURU, you may still wonder how much RAM you should install. As on the PC, more is always better, ...