Computer Bus Speed Standards:

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Computer Bus Speed Standards:

Postby roothick » Thu May 25, 2006 1:08 pm

Thought I had posted this previously.. but here is a listing of most of the PC bus speeds.

Standards For Computer Bus Speeds:

Bus Type..........Bus Width....Bus Speed.....Data Bits/Clock Cycle....Bandwidth
ISA 8-bit (PC/XT).......8.......4.77 Mhz............1 or 2............2.39 MB/s
ISA 8-bit (AT)............8.......8.33 Mhz............1 or 2............4.17 MB/s
ISA 16-bit (AT)........16.......8.33 Mhz............1 or 2............8.33 MB/s
LPC bus ..................4.......33 Mhz..............1................16.67 MB/s

DD Floppy..............1.......0.25 Mhz.............1..............0.03125 Mb/s
HD Floppy..............1.......0.5 Mhz..............1..............0.0625 MB/s
** DD= double-density. HD= high-density.**

EISA bus..............32.......8.33 Mhz.............1...................33 MB/s
VL bus.................32.......33 Mhz...............1..................133 MB/s
MCA-16................16........5 Mhz...............1...................10 MB/s
MCA-32................32........5 Mhz...............1...................20 MB/s
MCA-16 streaming......16.......10 Mhz...............1...................20 MB/s
MCA-32 streaming......32.......10 Mhz...............1...................40 MB/s
MCA-64 streaming......64.......10 Mhz...............1...................80 MB/s
MCA-64 streaming......64.......20 Mhz...............1..................160 MB/s

PCMCIA................16.......10 Mhz...............1...................20 MB/s
CardBus...............32.......33 Mhz...............1..................133 MB/s

PCI (standard)........32.......33 Mhz...............1..................133 MB/s
PCI 66 Mhz............32.......66 Mhz...............1..................266 MB/s
PCI 64-bit..............64.......33 Mhz...............1..................266 MB/s
PCI 66 Mhz/64-bit.....64.......66 Mhz...............1..................533 MB/s
PCI-X 66..............64.......66 mhz...............1..................533 MB/s
PCI-X 133.............64......133 Mhz...............1.................1066 MB/s
PCI-X 266.............64......266 Mhz...............1.................2133 MB/s
PCI-X 533.............64......533 Mhz...............1.................4266 MB/s
PCI-E 1.0 (1-lane).....1.....2500 Mhz..............0.8.................250 MB/s
PCI-E 1.0 (32-lane....32.....2500 Mhz..............0.8................8000 MB/s

Intel hubs, 8-bit......8......66 Mhz................4..................266 MB/s
Intel hubs, 16-bit....16......66 Mhz................4..................533 MB/s
AMD HT 2x2............ 2.....200 Mhz................2..................100 MB/s
AMD HT 4x2.............4.....200 Mhz................2..................200 MB/s
AMD HT 8x2.............8.....200 Mhz................2..................400 MB/s
AMD HT 16x2...........16.....200 Mhz................2..................800 MB/s
AMD HT 32x2...........32.....200 Mhz................2.................1600 MB/s

AGP 1x................32......66 Mhz................1..................266 MB/s
AGP 2x................32......66 Mhz................2..................533 MB/s
AGP 4x................32......66 Mhz................4.................1066 MB/s
AGP 8x................32......66 Mhz................8.................2133 MB/s

RS-232 Serial...............1....0.1153 Mhz.............1 to 10..........0.01152 MB/s
RS-232 Serial HS..........1....0.2304 Mhz.............1 to 10..........0.02304 MB/s
IEEE 1284 paralllel.......8......8.33 Mhz.............1 to 6..............1.38 MB/s
IEEE 1284 enhanced....8......8.33 Mhz.............1 to 3..............2.77 MB/s

USB 1.0................1........12 Mhz..............1...................1.5 MB/s
USB 2.0................2.......240 Mhz..............1....................60 MB/s

IEEE 1394a S100........1.......100 Mhz..............1..................12.5 MB/s
IEEE 1394a S200........1.......200 Mhz..............1....................25 MB.s
IEEE 1394a S400........1.......400 Mhz..............1....................50 MB/s
IEEE 1394b S800........1.......800 Mhz..............1...................100 MB/s
IEEE 1394b S1600.......1......1600 Mhz..............1...................200 MB/s

ATA PIO-4.............16......8.33 Mhz..............1.................16.67 MB/s
ATA UDMA-33...........16......8.33 Mhz..............2....................33 MB/s
ATA UDMA-66...........16.....16.67 Mhz..............2....................66 MB/s
ATA UDMA-100..........16........25 Mhz..............2...................100 MB/s
ATA UDMA-133..........16........33 Mhz..............2...................133 MB/s

SATA-150...............1.......750 Mhz..............2...................150 MB/s
SATA-300...............1......1500 Mhz..............2...................300 MB/s
SATA-600...............1......3000 Mhz..............2...................600 MB/s

SCSI (standard)........8.........5 Mhz..............1.....................5 MB/s
SCSI Wide...............16.........5 Mhz..............1....................10 MB/s
SCSI Fast..................8........10 Mhz..............1....................10 MB/s
SCSI Fast/Wide........16........10 Mhz..............1....................20 MB/s
SCSI Ultra.................8........20 Mhz..............1....................20 MB/s
SCSI Ultra/Wide.......16........20 Mhz..............1....................40 MB/s
SCSI Ultra 2...............8........40 Mhz..............1....................40 MB/s
SCSI Ultra 2/Wide.....16........40 Mhz..............1....................80 MB/s
SCSI Ultra 3 (160)....16........40 Mhz..............2...................160 MB/s
SCSI Ultra 4 (320)....16........80 Mhz..............2...................320 MB/s

Standard Processor Front-side Bus Setups:
33 Mhz 486..............32.......33 Mhz...............1...................133 MB/s
66 Mhz Pentium........64.......66 Mhz...............1...................533 MB/s
100 Mhz Pentium.......64......100 Mhz...............1...................800 MB/s
133 Mhz Pentium.......64......133 Mhz...............1..................1066 MB/s
200 Mhz Athlon.........64......100 Mhz...............2..................1600 MB/s
266 Mhz Athlon.........64......133 Mhz...............2..................2133 MB/s
333 Mhz Athlon.........64......167 Mhz...............2..................2666 MB/s
400 Mhz Athlon.........64......200 Mhz...............2..................3200 MB/s
533 Mhz Athlon........64......267 Mhz...............2..................4266 MB/s
400 Mhz Pentium 4.....64......100 Mhz...............4..................3200 MB/s
533 Mhz Pentium 4.....64......133 Mhz...............4..................4266 MB/s
800 Mhz Pentium 4.....64......200 Mhz...............4..................6400 MB/s
266 Mhz Itanium.......64......133 Mhz...............2..................2133 MB/s
400 Mhz Itanium......128......100 Mhz...............4..................6400 MB/s

Notes:
EISA= Extended Industry Standard.. uses regular 16-bit ISA slot, with added 16-bit bus width for true 32-bit bus.
VLB= Video Electronics Standard Architecture Bus.
IEEE 1394 also known as Fire-wire, an optical interface.
MCA= Micro-Channel Architecture.. an intent of IBM to expand a bus interface, unfortunately
it had too many 'dedicated' slot arrangements.
SCSI= Small Computer Serial Interface.
RS-232= Standard Serial Port, maximum speed 115.2 Kb/s
RS-232 HS= Higher-speed Standard Serial Port, maximum speed 230.4 Kb/s
USB= Universal Serial bus.
Mb/s= Mega-bits per second.
MB/s= Mega-bytes per second.
roothick
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