Questions about computer hardware, peripheral devices, and upgrading your computer

Hardware Software Storage Displays Laptops Internet The Web E-mail General		Hardware Questions: What is the difference between SDRAM and VRAM? Why does my cable appear to be missing pins? What are primary and secondary storage devices? What do the terms Mk2 and Mk3 mean? How do I check how much memory my computer has? Why won't my computer boot up after I installed new memory? What does it mean to "power cycle" a device? How can I tell if my CD/DVD drive burns CDs or DVDs? What is the difference between the DVD-R and DVD+R formats? What is the difference between Firewire 1394a and 1394b? How can I print to a printer connected to an Airport Base Station? How can I tell if a memory module is ECC parity RAM or non-ECC non-parity RAM? Can I replace non-ECC memory with ECC memory? What are some examples of computer peripheral devices? How do find out how much RAM my computer has and how much it is using? How can I upgrade my computer to USB 2.0? Can I use a generic v.92 modem from Wal-Mart in my Dell computer? What is the difference between physical memory and available memory? What is the difference between memory and hard disk space? What do I need in order to burn my own CDs? What is the difference between an AGP and a PCI graphics card? Will a USB 1.0 or 1.1 device work with my computer that only has USB 2.0 ports? What are the Alt (Option) and Control (Ctrl) keys for? Can I fax a document without a fax machine? What does it mean when a computer is "low on resources?" What is the difference between burning and ripping? Can I put my computer (tower) on its side, or does it need to stand up? Why is my mouse jumpy? Is it possible to increase the number of available PCI slots on my computer? What is the difference between AGP and PCI graphics cards? Why won't my scanner work? Why do videos run slow on my computer? What is the difference between the AMD Athlon and Intel Pentium processors? What does scalable mean, in reference to a computer?