PowerBooks don't use any of the above styles. In-stead they have unique memory modules which cost a bit more than the regular memory. The answer is 'yes', but by how much will depend on how you were using your Mac previously. A noticeable speed increase will be seen if you were having to quit applications to run others, or you were running Ram Doubler or Virtual Memory and using more memory then you actually had. Apple will be shipping new Macs with a minimum of 12MB soon.
RAM is really cheap right now, so take advantage of it.
Back to top Hard drive The hard drive is referred to as the permanent storage location of applications and data files. You can never have enough hard drive space in today's computers, as you will find they fill up really fast. The decision you must make is whether you want to replace your internal drive with a larger one. Some stores will take trade-ins that will reduce your costs. With this choice, you will need to have your data transferred from your old drive to the new one.