Computer Hardware

Yes, It usually depends on how much the CD storage. Cds hold more data, pictures, music and other stuff. A floppy disk can only hold kbs and mbs of files. That is less than the cds hold, and floppy disks are getting obsolete. CDs, DVDs, and USB flash drives are the latest to save things on.

when you say best im assuming fastest and most powerful, right. well the best desktops out there are mostly and mainly gaming computers. these have awesome performance, since because they're engineered for high-speed gaming. so i can guarantee these are the best for gaming, working and general tasking. but they can range up to $10, 000 (7,549.39 EUR). so the best would be the DigitalStorm Cryo-Tec or the Cyberpower Fang III Black Mamba. but you can upgrade even further BEFORE purchase. you can even double the price.

A megabyte (MB) is 1 million (1,000,000) bytes.

Roughly speaking, this means it can hold 1 million characters.

Strictly speaking, a character can take more or less than 8 bits to store, though, depending on the character and the encoding.

It is a standardized interface, meaning you don't need separate connectors for every type of device you may want to connect. It is cheap and easy to manufacture, has no pins to break, and can be safely plugged in and removed without risk of an electrical short.

It's 716.8 KB.

You can also use google as calculator, type in: 0.7 megabytes in kilobytes

But: DON'T USE ANY SHORTNAMES OR GOOGLE WON'T CALCULATE!

since there are 1024 mb in 1 gb, u do the math 1024 x 235

A tape library stores information about tape drives, magnetic strips of tape that read and write data such as those used in video cassettes and floppy discs. Tape libraries hold tape cartridges and read tap barcodes for identification.

Both, depending which fan you mean, as most computers will have several. Generally speaking the cpu fan blows air down onto the heatsink. The power supply fan blows air out. If you have separate case fans they will probably suck air in, which therefore creates airflow through the case in concert with the power supply fan.

For AC it is relatively simple from an electrical point of view. All that is required is a transformer. Even if there are other electronic solutions, unless there is good reason. Stick with the idea of a transformer since the only bad part about transformers, compared to other sophisticated electronic methods are: weight, size, stray magnetic fields but that's about all. They are robust and still very reliable and easy to use. They are available in high power units, they are easy to replace, easy to reconstruct and easy for anyone to understand it's function for later.

Transformers can step-up or down voltage depending on the ratio of windings between the primary (input) and secondary (output). If you have access to a company that wind or make transformers (Most modern city areas have such companies) One can contact them for more advice. What you will need is your primary voltage, secondary voltage, the VA

- VA is the Apparent Power which is the not the real average power since it does not include the power factor. It is only the volt(ac) x amps(ac) of the secondary. The general idea is that the power you apply on the input should be close to the power you get from the output, even though you do have some power losses (Eddie current, heat, ext.)

Then you also need to specify the type of transformer. Normally an E-Core transformer can be used. E-core is a transformer with a metal core with laminations shaped like an "E" to reduce Eddie Currents. More information can be obtained from:

http://en.wikipedia.org/wiki/Magnetic_core

If you need 24Vac for a 100W lamp then the current will be 100W/24V = 4.16A so basically you need a (24V x 4.16A) =100VA step up transformer with 12V primary and 24V secondary in a E-core style. Also note that the primary current will then increase to 8.33A since 100W/12V = 8.33A. It might even be a little bit more but never less. One cannot create energy.

Riser card

Basically hardware is the physical machine you run your software (programs) on. For example hardware includes monitors, keyboards, motherboards, cd-roms, processors, etc.

Meanwhile software are the programs you run (like notepad, Firefox, Safari, MS Word or games) and the operating system (which is a special case of software which works as a layer between the hardware and all other software).

A circle with an arrow pointing out of the circle

The system unit is basically the whole computer minus the monitor and peripherals like keyboards, mice, speakers, webcams etc.

Most system units will be composed of:

· Central Processing Unit

Usually referred to as the CPU, it's the brain of the computer and its most important part as it performs the instructions of computer programs and executes the functions of the computer.

· Disk Drive

Most commonly a CD and/or DVD disk drive nowadays, though there are still computers in operation withfloppy disk drives, they are used to read externally inserted disks so as to extract data off them.

· Expansion Cards

These include graphics cards and sound cards that offer new functions and possibilities to the computerand its users. Most units will have spaces for these cards to be easily added.

· Hard Disk Drive

Otherwise known as the hard drive, this is a computer's main storage component, this is often confused with memory, or RAM.

· Random Access Memory:

Commonly known as RAM, it supplies and holds information that the CPU uses while the computer is switched on, but does not store it to permanent memory.

· Power Supply Unit

Like a battery, no juice no work! The PSU in most PCs converts the AC electricity from the mains into DC to eliminate surges that may damage the delicate infrastructure of the system unit.

· Video Card:

Otherwise known as a display adapter, they are used as a medium between the system unit and themonitor.

In this instance, you likely mean cache memory, though you could mean RAM, particularly DRAM. Cache memory, like the L1, L2, and L3 processor cache, helps to speed up operations between the CPU and RAM.

A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. PSU is a output device because it is outputting power to the rest of the device. Most personal computers can be plugged into standard electrical outlets.

Most commonly it is C drive but Hard drives can use any letter in the Alphabet (A-z. Usually when a floppy drive is available it makes itself A drive. and a dvd/cd player usually makes itself D or E. but these are automatically assigned these letters and you can change the letters of the drive (not by renaming won't work like that).

If the computer is recently purchased, look for an "EnergyStar" in the manual, or during the bootscreen of the computer. This ensures that the computer consumes a low amount of energy when compared to the possible amount of energy any given computer can consume.

Also, in the manual look for the RoHS symbol, this company's acronym stands for "the restriction of the use of certain hazardous substances in electrical and electronic equipment".

http://www.rohs.gov.uk/

No you can not plug a PCI card into a PCI-Express slot. PCI and PCI-Express slots are physically of different size and differ in connectivity. - Neeraj Sharma True, you cannot directly connect a PCI card to a PCI Express slot, partly because the physical slot design is different, but also because PCI and PCI Express handle data in completely different manners. There are however, adapters available that will enable you to connect a PCI card to a PCI Express slot through an interface that "translates" PCI signals to signals that PCI Express can read. They are available in single PCI to PCIe configurations, but those require a bit of extra space within the chassis if your computer. You need to make sure you have the required space available. There are also adapters available that include a PCIe card with a serial(?) port to which you connect a cable that attaches to an expansion box that accepts multiple PCI cards. One example can be found here:

http://www.virtuavia.eu/shop/pci-express-to-pci-expansion-box-p29809.html

Of course, you should remember that using one of these means you are pumping four PCI card's worth of information through a single PCIe slot. You need to do your homework before just randomly plugging four cards into an adapter like that. A combination of Firewire and USB cards may not be a problem, whereas combining video and sound cards could present problems. Due diligence is certainly called for! For a better understanding of my edit to this answer, you may want to read the discussion area.

The biggest disadvantage is the same with any removable data storage, that it might get lost. But more than that pen drives have relatively small storage capacity. They hold out better against CD's because they are re-writable but still, in the end it actually depends on you, the purpose and if you prefer the portability of pen drives over other storage options, like an external hard drive. Or if you chose pen drives over cloud storage because you don't always have access to the internet

Yes, it is possible to protect your hard drive using the lock command. E.g.

Lock sys: on - this will lock your partition Lock sys: off - this will unlock it.

If you wish to lock a drive other than your main partition simply substitute Sys: for the drive name.

I have a question for you: How do you turn ON write protection on your hard drive to begin with? As far as I know you can't. Hard drives were designed to be written on. You can't install an operating system on it without writing to the disk.

The only way to prevent someone from saving something would be through the operating system's security management. Before you can disable what you think is write protection, you need to understand what is protecting it to begin with.

Simple! Click Start Button > Type: Create and format hard disk partitions > Enter > Right click on your drive (the one that's write protected) > Click Offline > Right click again > Click Online. Voila! tnt4real!

Some hard drives have a jumper on them for write protect. You need to check the jumper settings

I just had this issue with one of my external hard drives. It's an internal drive that I installed into an external case and connects to my computer via FireWire. I knew it couldn't be a jumper setting, because the drive has not been removed from the case since it was put in there. I did NOT turn "ON" write protection at any time. I've been writing to this disc with no problems (daily) up until today. I tried copying a file to it, it popped up a message saying that can not write to disk, disk is write protected. I did nothing to cause this. No settings, attributes, etc. After looking around a bit with no luck (not even from here). I tried a couple of my own things. Found I could not change attributes (cause disk is write protected).

I finally unplugged the drive from the firewire port and waited a few minutes. Plugged it back in and let the computer "find" the drive again, and all is well.

The write protect is in your bios. You select "enable" write protect and it will ask you for a password. Note: not all bios versions offer this option.

I'm considering cleaning up my hard drive of all unwanted ware, especially spyware, and then turning on "write protect" for my hard drive to keep the stuff out. I'll be using a flash pen to surf with which can be cleaned much faster than a hard drive full of stuff and zillions of places for things to hide.

The post above said you turn on this feature in the bios. Can you elaborate on this as to how it's done? I have a Thinkpad r40 and can't seem to find anything on how to do it at ibm or google.

Thanks in advance...

I just had the same thing happen. Hard drive said write protected. Not even a floppy at boot would work. Then I realized when I hit delete for setup, both the hard drive and floppy were flipped to write protect in the bios.

I had the same thing happen to an old P III 800mhz computer; "write protected" message. After reading this I looked in CMOS for a setting for hard drive write protect, I have never heard of this as a bios option (floppy write protect yes, but not harddrive), did NOT find a setting for write protect for either floppy or hard, but I went ahead and did a reset CMOS to optimal setting anyway, booted and all was right with the world!

Thank you for the helpful info. I had tried everything, including fdisk/MBR, cloning to new hard drive, trying to do new install of OS on fresh drive... all failed, thought motherboard or IDE subsystem was hosed. Resetting CMOS WORKED.

If you download Windows SteadyState you have the option to limit who has access to what. You also have the option to lock your HDD. Everything you save will be undone the next time you boot. Here is the link to the download for you.

http://www.microsoft.com/downloads/en/details.aspx?familyid=d077a52d-93e9-4b02-bd95-9d770ccdb431&displaylang=en#QuickDetails

Just copy and paste that website into your browser. Also this is made by Microsoft and is free.