Motherboard Cpu Memory
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I would like ask about Computer memory,Cpu,CD-writters and motherboard.?
1, Most CD-writer are rated with three numbers like 48X/12X/48X on their tray(a typical CD-writer for example) what do these speeds represent?
2, The most imprortant componenet when buying a computer is the motherboard . what features of a motherboard do you like when purchasing one?
3 ,mark the clear margin of CPU speed between different Pentium processors.try to identify the major advancement between all Intel processor.
4, Processor can be identified by two main parameter How wide and How fast they are.three main specifications in a processor(regarding width) are expressed.
a) Data I/O bus
b) Internal Registers
c) Address bus
Explain the concept behind the aforementioned specifications.
1. Speed of read/write/burn
2. Things that are important to me when buying an MB is SATA/IDE channels. I still have lots of IDE drives and prefer to use SATA for hard drives not CDroms. I'm find most MBs today come with a pitiful single IDE channel 
I prefer to use an older drive that's too small for my swap drive and the 3.5 terrabytes in my machines are just not enough.
I consider the brand. I've had mostly good luck with ASUS and Tyan so I tend to stick with those brands.
How many slots they have. I dual home and most MBs come with only one on board nic card. I add in a break out box card, a 2nd nic, then if the onboard vid card fails, I want to put two heads on the box or upgrade the vid card I'm SOL or have to give up either a nic card or move my break out box card to another machine. 2 PCI slots is just not enough.
I use Linux so many things that were so urgent for me back in my Windoze days mean little too me today. For example total memory. You need 2 to 3 times as much RAM to get the same performance from windoze as you get with LInux. So MBs always have plenty of RAM slots for my needs today. If your into high end games what kind of vid slot is on the MB is important. This changes frequently and if you buy the last fad for best video performance your going to have a hard time finding a card that meets your needs. A serious gamer will spend more on their vid card than I spend on my whole machine.
Of course you want to make sure you get an MB for the type of chip you use. I prefer AMD myself.
3. Good luck on that. Used to be easy to figure out. Both AMD and Intel have adopted naming that make no sense and tell you almost nothing about the real speed of the CPU. Even the Mega hertz of the CPU is relative to the type of CPU. So a 3ghz processor isn't always faster than a 2.5ghz. As soon as you figure out what their obscure names mean both Intel and AMD develop new ones. Maybe somebody else here can make sense of it for you.
4. Huh? By width do you mean bus size as in 32 bit, 64 bit an so on?
If your asking #1, it'll be rather difficult to explain A, B and C too you. The internal registers, far as I know there are no external registers any more, maybe mainframes still use them, but PCs never have. Internal registers are where you store information used by Assembly/machine code instructions. They are named things like AX, DX, etc. For a computer to work on the most basic level they will do things like take the contents of one register and act upon them by what is on the stack and the contents of other registers. Registers may contain instructions, data, pointers or memory addresses. Most registers have dedicated purposes but some are general purpose registers that you can put any of the above into.
I think when you say I/O bus your talking about the bus. Think of the bus as a place where all the roads congragate as they enter a city. All data coming from things like your flash drive, hard drive use a bus. These's buses are channels. One reason I hate using USB keyboards and mice are they clutter up the USB bus. If your scanning a large pic the scan is slowed down by every keystroke and mouse movement you make. True it's only a very amount of data that is unless your writing a novel while your scanning a pic and then those little milliseconds waiting for the keyboard are noticable and annoying.
The early PCs had only the ISA bus. Everything funneled into it. Most computers today will have a PCI bus, USB bus and some sort of dedicated Video bus. They all still converge so the CPU can process input but seperating them improves performance. That's the basics. You can get more technical but not without a deeper understanding of the achitecture and how it works. I am giving you a high level view and for the sake of simplifying the concepts there are some things that are not quite right but close enough for the overview.
You might also be talking about the stack the way you asked the question.
The address bus sounds like you are talking about the way the CPU talks to the RAM. The address bus was a major limitation on how much RAM a computer could have under windoze until Microsoft copied the UNIX style of memory addressing. Until then you were limited by your address bus as to how much RAM you could actually address. A 32 bit address bus was limited to what could be described by a 32 bit number. By paging memory you can exponentially increase that leading to gigs of ram on 32 bit and 64 bit machines using modern operating systems. Paging is a way of breaking memory into chunks, then giving each a virtual address. For example your address includes city and state. The state would be the page, the city would be the address in the state. So addressing the memory then is a matter of page/address. A better example might be if books renumbered their pages starting with 1 at the start of each chapter. If you only had room for 100 entries in your table of contents th
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