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| | | | FAQ Revisions | Editors: Cariad  , vkr , dragon , dbmaven
Last modified on 2008-05-05 11:15:42
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2.1 Build/Where to Buy·Build your own computer
·How to calculate power supply wattage
·Why use Electro Static Discharge straps
·Where to buy Hardware
·Where can I find AMD Athlon and Athlon XP/MP Recommended Power Supplies?
·How To Build A Computer
| | | More links giving step by step instructions instructions on how to build your own computer:
•BBR... courtesy of 2kmaro
•Tom's Hardware
•Acme
•Crazypc
•PC Mechanic
•Hardware Central
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by RClarkofNC edited by dragon
last modified: 2005-01-18 19:50:08 | | | It's crucial to purchase a power supply that matches or somewhat exceeds the power needs of your PC. Each component requires a certain amount of power. Using the chart at right, add up the power requirements of your PC's components, and then add another 30 percent for "wiggle room." Most systems will do fine with a 250- or 300-watt supply; there's no advantage in purchasing a supply with considerably more capacity than your system needs.
Please remember to take into consideration any USB devices you might be attaching to your system.
COMPONENT | TYPICAL WATTAGE | | Processors | | | Celeron 700 MHz Chip | 21 | | 1 GHz Pentium III Chip | 33 | | 1.7Gig Pentium IV chip | 65 | | 1.4 GHz Athlon chip | 70 | | SECONDARY STORAGE | | | IDE Hard Drive | 15 | | Floppy drive | 5 | | ZIP drives | 10 | | CD ROM | 10-25 | | CD R/RW - DVD | 10-25 | | Tape drive | 50 | | Standard SCSI Hard Drive | 10-25 | | 10K or 15K rpm SCSI H-Drive | 10-45 | | OTHER | | | Motherboard | 15-30 | | Average PCI card (NIC etc) | 5 | | Memory | 10 per 128MB | | Graphics Card | 20-50 | | Modem | 10 | | Sound Card | 10 |
Reference
[note: Edited by Awgeewhiz, Source by Jtmo]
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by Awgeewhiz edited by dbmaven
last modified: 2003-09-05 11:09:54 | | | Taken from the A+ Certification book by Michael Meyers.
Typical Electrostatic Voltages-
Humans can accumulate electrical potentials well over 25,000 volts. Although we might experience a shock or other sensation when the charge dissipates, it is a very quick, low-current flow that is not harmful. But as little as 30 volts can destroy some of today's more sophisticated integrated chips, so daily activities can generate static charges on your body that are potentially harmful to sensitive electronic components.
Consider the following:
Walking across carpet: 1,500 to 25,000 volts
Walking over an untreated vinyl floor: 250 to 12,000 volts
Picking up a common plastic bag: 1,200 to 20,000 volts
Working at a bench: 700 to 6,000 volts
Handling a vinyl envelope: 600 to 7,000 volts.
Costly Effects of ESD
An ESD must reach a minimum of 3,000 volts of electricity before most people notice the shock. Although most of us feel an ESD of 3,000 volts, we fail to feel smaller charges, and yet these charges still damage semiconductor devices. Many of the CMOS technology components can be destroyed by less than 1,000 volts.
Technology continues to advance, making smaller, more closely packed components. The microscopic spacing of insulators and circuits within chips is increasing the sensitivity to ESD. Proper ESD protection is a must!
Types of ESD Damage
The damage caused by ESD takes on three forms: upset failures, latent catastrophic failures, and direct catastrophic failures.
Upset failures occur when a small ESD causes minor gate leakage. Upset failures are intermittent in nature. This type of damage might not be detected by quality control or end-user test programs, but it shows up as an unexplained loss of data. These ESD cause the most embarrassment to technicians because mishandling parts tends to create this type of error. The embarrassment manifests itself as repeated calls, or worst yet, installing a device such as extra RAM. The RAM takes an upset failure and displays random-memory errors during POST. Who was the last person to touch the system? You! "Everything was fine until you touched it!" Sound familiar?
Latent catastrophic failures occur when the ESD damage causes the transistor junction to weaken; we like to call these zings. This transistor might pass all tests, but over time will react with poorer system performance and eventual system lockups. Because latent failures show up well after installation, the cause of these lockups seems "unknown," and the cost to troubleshoot and repair usually makes system replacement worthwhile.
Direct catastrophic failures, known as zaps, usually occur with ESD shocks of more than 3,000 volts. The device that takes the shock fails completely, and you must replace the part. The obvious failure makes zaps the easiest to find, as diagnosis tends to point quickly to the failed device.
Pages 366-368 in the 2001 revision
As posted by YIN
JTMO- Wrist straps are only a few dollars at the local electronics store. Use them and save yourself some grief later on.
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by Jtmo edited by dbmaven
last modified: 2003-09-05 11:10:30 | | | Competitive Pricing Information:
•PriceWatch
•Price Grabber
Where to buy (parts to assemble your own system):
•NewEgg
•Mwave
•Plycon
•Computers4sure
•Shentech
•Cyberguys
•AxionTech
•Outside Loop
•Antec
•Directron
Complete/Assembled Systems Vendors:
•CyberPower Inc
•Alienware
•A&N Labs (No Resellerratings listing)
•ABS
•Falcon Northwest
•Overdrive PC
•IBUYPower
•IBEXPC.com
•PC Connection
Please let dbmaven or dragon know if any of the links are broken.
links provided by members of the Hardware forums
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by Cariad edited by dbmaven
last modified: 2007-08-06 20:05:13 | | | Athlon Processor Recommended Power Supplies located here
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by onavi edited by dbmaven
last modified: 2003-09-05 11:31:22 | | | Building a computer is a very rewarding experience. You can learn more about computer hardware by building a computer than you can by reading every computer hardware textbook ever written. Aside from that, you get a totally personalized computer that no OEM (Original Equipment Manufacturer) could match, and there is also the opportunity to save a lot of money in the process. The only downside is that you won't have any technical support number to ring, or any warranty service, so there may be a chance that you will have to pay more for service (if you don't repair yourself). So now you've been sold on the merits, read on to find out how...
»en.wikibooks.org/wiki/How_To_Bui···Computer
Also, see the sticky thread by our own 2kmaro in the Hardware Help forum:
/forum/remark,12410887
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by Cudni edited by dbmaven
last modified: 2005-08-21 20:21:10 |
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