The Macintosh Laptop MB404LL/A
<<<...As per the standards, Mac books require at least 128 MB of RAM, and 256 for Mac OS X. If you are a software professional or mostly use your laptop in the same line you may opt for a 512MB RAM or more. For Graphic designers and gamers, a RAM of at least 1GB and beyond is suggested. Therefore, if you are upgrading your laptop from 128 MB RAM to 512 MB RAM then you can expect your laptop to deliver a 20% to 40% more faster speed.
Nevertheless, a spoiler always exists. You must also make sure that other parts of your Mac book are able to support this upgrade. It’s mainly the VRAM that creates the problem. Upgrade your VRAM to get a more color clarity and picture resolution. Graphic designers and gamers should specially put this into consideration.
And now when you are confident of what type, speed and amount of RAM to install, get yourself one from a computer hardware store or from the Internet. Make sure to check the warranty period before buying. Open your Mac book cover and you can easily locate the RAM slot. It stays just beneath the keyboard.
Open the clips and put the new RAM into the slot and lock the clip. Turn on your Mac book and you can easily locate it installed. If it’s not installed turn off and check. If further problems persist, consult with your computer vendor. Thus, within a few minutes you can get your Mac book’s memory upgraded. Check of how fast your Mac book responses.