Bit Isa
Bit Isa
Understanding The Speed Of New Pci Express Data Bus
The personal computer is constantly changing with such component upgrades for memory,cpu speed and hard drive capacity.And the video display is no exception.
The video display consist of a Graphics Card, Monitor,and the Bus.If you're wondering what the heck is a Bus in any video display,its the data path along which data moves into, out of, and inside the the computer.
This data is sent from the motherboard and central processing unit, to the graphics card,travels along the data path or Bus, to the Monitor where our eyes can see it.The data Bus is partly responsible for our clear and fast the graphics of our favorite games are displayed.
It does not matter how fast the CPU chip or graphics card can send data if the Bus becomes too small and prevents the data from traveling fast.This causes a bottleneck of data when the graphics card sends data faster then the Bus can allow it to travel.
The first Bus was introduced by IBM or International Business Machines and was called the ISA.The Industry Standard Architecture Bus was slow and weak since it sent data at just 4MHz.
But it was matched with the CPU chip of that day.The average cpu speed during this time was around 4.77MHz. This bus came in 1981 and IBM created a faster bus soon after with a 16 bit bus with a cpu speed of 8 to 10 MHz three years later.
By this time many other computer makers were building Computers using the IBM design and IBM quickly responded to the competition by making a proprietary
bus called the MCA or Micro Channel Architecture.
When IBM built proprietary Buses they mean they built hardware or software, in this case Buses, owned and controlled by a single individual or organization.
The Bus technology came about in the following order.
1983 IBM introduced the ISA Bus and in 1984 the faster 16 bit ISA Bus arrived.Then in 1987 the 32 bit MCA Bus showed up.And in 1988 Compaq and other PC makers released the 32 bit EISA or Extended Industry Standard Architecture bus
1993 brought us the Video Electronics Standards Association or the VESA Bus.This year also allowed the release of the PCI or Personal Computer Interconnect Bus.
And in 1996 came the AGP or the Advanced Graphics Port while 1998 brought us the AGP 2.0 and in 2002 came the ,you got it, the AGP 3.0 data bus.
Finally in 2005 Intel and AMD introduced computers running at speeds of 4Gigabytes or more.At these speeds the AGP port presented at slowdown for the data.
So the folks at Intel put their heads together and came up with the PCIe.The Personal Computer Interconnect Express.The bus is like the PCI but uses a serial port whereas the PCI use parallel ports.
Parallel ports send data in chumps and Serial ports send data one at a time.With the PCI bus, each slot share a maximum of 132MB a second and the PCIe allow each slot to have 250 Megabytes a second to send data.
PCIe is intended to be used as a local interconnect only.As it is based on the existing PCI system, cards, and systems can be adapted to PCI Express without any change in software.The higher speeds on PCIe allow it to replace almost all existing buses.
Nearly all high end graphics cards today in 2006 from AIT and NVIDIA use PCI Express.And Nvidia use the faster data transfer of PCIe for their SLI or Scalable Link Interface technology.
This technology allow two graphics cards of the same chipset and model number to be ran at the same time. This greatly boost performance like you never thought possible.
Not to be out done, ATI came on the scene with their dual GPU system or Graphics Processing Unit called the Crossfire.
As you can see, the PCI Express bus is faster and if possible, when purchasing your next computer, be certain it comes with PCI Express slots.
The AGP data bus was fast compared to the PCI but they are both fading away.So it is very beneficial to you if you get to know and understand the PCIe in every detail.
About the Author
Otis F. Cooper is solely dedicated to boosting the knowledge and confidence of every computer user. Sign up to receive his informative articles every month and learn PC Repair absolutely free.Sign up
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Packard Bell Game / Modem / Sound Card 16bit ISA - FCC ID: 138-MMSN834 $32.00 |
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CANON ISA SCSI Controller NCR 53C400 FG2-5202 8 BIT Vintage Computer Board $9.99 |
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CANON ISA SCSI Controller NCR 53C400 FG2-5202 8 BIT Vintage Computer Board $8.88 |
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Monochrome 8-Bit ISA Video Card with Parallel Port $49.99 |
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IBM ISA 8BIT MFM HARD DISK CONTROLLER 62X0786 $193.20 |
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IBM ISA 8BIT MFM HARD DISK CONTROLLER 1501492 $193.20 |
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Sun 6333/2 (EX 4013), Parallel Port, 16 bit ISA, Vintage, Chip Set HT6535 $7.99 |
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IBM 16 BIT ISA TOKEN RING NETWORK CARD 6395754 $210.00 |
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IBM 16 BIT ISA TOKEN RING NETWORK CARD 60G3994A $210.00 |
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D-Link DE-220PCT 10Mbps Combo 16-bit Ethernet ISA Adapter $9.99 |
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SMC 16 Bit ISA 10B2 10BT Network Card 8013EWC $9.93 |
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US ROBOTICS 0335 8BIT ISA MODEM TESTED $25.00 |
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1MB Tseng Labs 16-Bit ISA VGA Video Card $29.99 |
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Lastest 6-in-1 PCI LPT ISA Motherboard Diagnostic Card Stability Test 6-bit $14.99 |
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USR 96385 56K 8 bit ISA Modem 00096385 $50.99 |
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Symbios Logic (#SYM20403) 16 bit ISA SCSI controller card $2.99 |
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Lastest 6-in-1 PCI LPT ISA Motherboard Diagnostic Card Stability Test 6-bit $14.99 |
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NDC SOHOware ND5320 16-Bit ISA Network Adapter Realtek RTL8019AS Chipset 10baseT $79.95 |
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Accton EN1661 16-Bit ISA Network Ethernet Adapter Card $18.99 |
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Sound Card - Labway - LWHA151A00 - ISA - 16-Bit - 1993 $40.00 |
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AMD * Athlon 850 slot CPU + SOYO K7VIA Motherboard 1 16 bit ISA 2 PCI, 2 Serial $150.00 |
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Multitech MGA-PC PB85005-7H 8-Bit ISA Monochrome Graphics Card $59.00 |
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SD SD-203 Controller Card 16-Bit ISA $19.50 |
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Parity Memory CD.128KB 16-Bit ISA Controller Card $39.50 |
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ESS ES1898F 16-Bit ISA Sound Card $11.99 |
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8 Bit ISA Video Card Western Digital VGA Plus Paradise PVGA1 60-603011-04 Rev x3 $79.95 |
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Zenith 85-2964-3 8-Bit ISA Backplane Board - 8 ISA Slots $37.80 |
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V1433VQH-X 8-Bit ISA Voice Modem Card w/ Jumpers $11.99 |
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NEW IN BOX MONOCHROME ISA VIDEO CARD 8 BIT W PARALLEL PORT MONO GRAPHICS ADAPTER $59.99 |
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25H3501 IBM 10/100 Ethernet Adapter ISA 16-Bit $42.00 |
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