|
Here is some useful information:
(Upper Limit) Typical
Bandwidth Max
Bandwidth
(Binary
Corrected)
Internetworking - Standards & Protocols
Symbols Speed Measurements
kbps or Kbps Kilobits per Second = 2 bits per
second
mbps or Mbps Megabits per Second = 220 bits per
second
gbps or Gbps Gigabits per Second = 230 bits per
second
n/a not applicable, meaning "no longer used"
Wireless Communications (Cellular Devices - Voice &
Data)
see also CDMA, EDGE, GSM, GPRS, TDMA
Note: Typical cell phones operate on various 800, 850,
900, 1800, 1900 MHz channels
CDMA (Qualcomm) - Code Division Multiple Access varies
varies
AMPS - Advanced Mobile Phone Service (Legacy) varies
varies
TDMA - Time Division Multiple Access, see GSM and new
Digital Cellular Networks varies varies
GSM - Global System for Mobile Communications,
Narrowband TDMA (for Voice) 9.6 kbps 9.6 kbps
GPRS - General Packet Radio Service (for Data) 115 kbps
115 kbps
EDGE - Enhanced Data GSM Environment (for Data) 384
kbps 384 kbps
Wired Communications (see also: Internet, WAN, LAN)
Networking and Internet Access (see also: ISP, choosing
an ISP)
PSTN - Public Switched Telephone Network
see also POTS - Plain Old Telephone Service
PSTN / POTS / Voice - UTP RJ11, Analog Connection 2.4
kbps n/a
PSTN / POTS / Voice - UTP RJ11, Analog Connection 9.6
kbps n/a
PSTN / POTS / Voice / Dialup - UTP RJ11, Analog
Connection 28.8 kbps 28.8 kbps
PSTN / POTS / Voice / Dialup - UTP RJ11, Analog
Connection 33.6 kbps 33.6 kbps
PSTN / POTS / Voice / Dialup - Phone line voltage
limits restrict to ~53 kbps or less 56.0 kbps 53.0 kbps
ISDN - Integrated Systems Digital Network
ISDN base unit, single channel, 1 * 64 kbps B channel
(56 Kbps data + 8 check bits) 64 kbps base unit
ISDN - standard UTP RJ11 with Digital Connection using
2 * 64 kbps B channels 128 kbps 128 kbps
Satellite Digital Networks
DirecPC (RF Satellite Signal from Hughes Data Systems)
400 kbps 400 kbps
DSL - Digital Subscriber Lines (see also Types of
DSL)
IDSL - ISDN DSL 128 kbps 128 kbps
ADSL - Residential, Asymmetric DSL (residential and
small business class) 1.5 mbps 768 kbps
G.Lite - "DSL Lite" 1.5 mbps 768 kbps
RADSL - Rate Adaptive DSL (Westell designed software
adjusted speed settings) 2.2 mbps varies
HDSL - High Bit Rate DSL or SDSL Single Line DSL (not
the "true" DSL) 2.27 mbps 2.27 mbps
ADSL - Business, Asymmetric DSL (for larger customers)
9 mbps 1.0 mbps
SDSL - Symmetric DSL, "true" DSL 16 mbps 2.0 mbps
VDSL - Very High Bit Rate DSL 55 mbps varies
Cable Modem Access
Cable - Residential (75 ohm coaxial cable with digital
signal) 3.0 mbps 1.0 mbps
Cable - Business (75 ohm coaxial cable with digital
signal, max unrestricted) 52 mbps 3.0 mbps
Carrier System Classes: DS - Digital Systems, T - T
Class Systems
T / DS unit 64 kbps * 0001 channel (base unit for DS)
64 kbps base unit
T-1 / DS1 64 kbps * 0024 channels (TP, Coax, or Fiber
Optic) 1.5 mbps same as max
T-1C / DS1C 64 kbps * 0048 channels (TP, Coax, or Fiber
Optic) 3.0 mbps same as max
T-2 / DS2 64 kbps * 0096 channels (TP, Coax, or Fiber
Optic) 6.0 mbps same as max
T-3 / DS3 64 kbps * 0672 channels (TP, Coax, or Fiber
Optic) 42 mbps same as max
T-3D / DS3D 64 kbps * 1260 channels (TP, Coax, or Fiber
Optic) 135 mbps same as max
T-4 / DS4 64 kbps * 4384 channels (TP, Coax, or Fiber
Optic) 274 mbps same as max
ATM - Asynchronous Transfer Modes
ATM CBR, VBR, UBR, ABR varies varies
Optical Carrier Classes, Synchronous Transport
Modules
OC-1 / STS-1 (Close to, but somewhat faster than, a
T-3.) 52 mbps same as max
OC-3 / STS-3 / STM-1 160 mbps same as max
OC-12 / STS-12 / STM-4 640 mbps same as max
OC-24 1.25 gbps same as max
OC-48 / STS-48 / STM-16 2.50 gbps same as max
OC-192 / STM-64 10.0 gbps same as max
OC-255 13.2 gbps same as max
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Network - Cabling see also Cable Types, ANSI, EIA, TIA
and CAT6 spec
10Base5 Coax (THICK Coax LAN) 10 mbps same as max
10Base2 Coax (THIN Coax LAN) 10 mbps same as max
RG-59 Coax (20 gauge Cu core, rated for below 1 GHz)
200 mbps 100 mbps
RG-60 Coax (18 gauge Cu core, rated for 1 GHz or
slightly more) 2 gbps 1 gbps
CAT1 UTP (2-pair, 100 ohm, to 1 MHz) POTS - Standard
Phone Cord 1 mbps 56 kbps
CAT2 UTP (2-pair, 100-ohm, to 4 MHz) 4M-TR IBM Token
Ring 4 mbps 4 mbps
CAT3 UTP (4-pair, 100-ohm, to 16 MHz) 10BaseT Ethernet
16 mbps 10 mbps
CAT4 UTP (4-pair, 100-ohm, to 16 MHz) 16M-FTR IBM Fast
Token Ring 16 mbps 16 mbps
CAT5 UTP (4-pair, 100ohm, to 100MHz) 100BaseT or
simplex 1000BaseT Ethernet 1 gbps 100 mbps
CAT5e UTP (4-pair, 100ohm, to 350MHz) 100BaseT or
duplex 1000BaseT Ethernet 2 gbps 200 mbps
CAT6 UTP (4-pair, 100ohm, to 400 MHz;
ANSI/TIA/EIA-568-B.2-1) 1GbE*2, 10GbE*1 10 gbps 2 gbps
CAT6e UTP (4-pair, 100ohm, from 400-600MHz, proposed
standard) 10GbE*1 or *2 20 gbps will vary
CAT7 UTP (4-pair, 100ohm, from 600-700MHz, proposed
standard) 10GbE* 2 farther 20 gbps will vary
Note: 2-pair connect via RJ11 modular plugs, 4-pair
connect via RJ45 modular plugs.
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Wired Networking - Standards & Protocols
Token Ring Network (see also IEEE 802.5)
Token Ring LAN (IEEE 802.5) - 4 Mbps 4 mbps varies
Fast Token Ring LAN (IEEE 802.5) - 16 Mbps 16 mbps
varies
FDDI - Fiber Distributed Data Interface
FDDI 100 mbps varies
FDDI-2 200 mbps varies
Ethernet Network Standards (see also IEEE 802.3 or
Ethernet Designations)
Ethernet (10BaseT - usually via CAT3) 10 mbps varies
Fast Ethernet (100BaseTx - usually via CAT5/5e) 100
mbps varies
Gigabit Ethernet (IEEE 802.3z via Optical; 5 meters via
CAT5e; farther via CAT6) 1 gbps varies
Wireless Networking - Standards & Protocols (see also
Wireless LAN links)
Bluetooth Standards (see also Bluetooth
Specifications)
Bluetooth v1.0 - 2.45GHz DSSS, 1600 hops/sec among 79
freqs. at 1 MHz intervals 2 mbps varies
IEEE 802.11 Wireless Protocols (see also 54g high speed
wireless)
802.11 Up to 2 mbps @ 2.4 GHz using FHSS or DSSS 2 mbps
varies
802.11a Up to 54 mbps @ 5.0 GHz using OFDM 54 mbps
varies
802.11b Up to 11 mbps @ 2.4 GHz using only DSSS
("Wi-Fi") 11 mbps varies
802.11g Up to 54 mbps @ 2.4 GHz using FHSS or DSSS 54
mbps varies
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Peripheral Buses - External Device Connection
Standards
Serial Ports (see also UART and 16550 UART)
8250 UART (1 Byte FIFO) original IBM UART 9.6 kbps
varies
16450 UART (8 Byte FIFO) common for legacy modems 38.4
kbps varies
16450 UART (8 Byte FIFO) 76.8 kbps varies
16550A UART (16 Byte FIFO) 1 * 16550A (most common for
modern modems) 115.2 kbps 56.0 kbps
16550A UART (16 Byte FIFO) 4 * 16550A 460.8 kbps
varies
16550A UART (16 Byte FIFO) 8 * 16550A 921.6 kbps
varies
16550 UART (16 Byte FIFO) 153.6 kbps varies
16650 UART (32 Byte FIFO) 307.2 kbps varies
16750 UART (64 Byte FIFO) 614.4 kbps varies
16950 UART (128 Byte FIFO) 1228 kbps varies
Parallel Ports (see also EIA-232, Parallel Standards
List)
RS-232 original 9.6 kbps varies
EIA-232 includes: RS-232C (DB-25, 25-pins), DIN (DB-9,
9-pins), and Centronics varies varies
ADB - Apple Desktop Bus - Proprietary Apple Computer
Bus
ADB 1.5 mbps varies
IrDA - Infrared Data Association
IrDA 4.0 mbps varies
USB - Universal Serial Bus see also USB, USB 2.0
USB 1.0 - Low Speed - USB 1.0, 110-225 ns range
devices 1.5 mbps same as max
USB 1.1 - Full Speed - USB 1.1, 48 MHz, 12-25 ns range
devices 12.0 mbps same as max
USB 2.0 - High Speed - USB 2.0 480 mbps same as max
Firewire Standards (see also IEEE 1394 trade
association)
Firewire 400, IEEE 1394a, Firewire 400 mbps same as
max
Firewire 800, IEEE 1394b, Firewire 2.0 800 mbps same as
max
High Performance Parallel Interface (for Super
Computers, see also T11.org)
HIPPI - Various Cabling @ 200 MHz on a 32-bit bus 0.8
gbps same as max
HIPPI Wide - Various Cabling @ 200 MHz on a 64-bit bus
1.6 gbps same as max
HIPPI-6400 - Fiber Optic Cabling @ 800 MHz on a 64-bit
bus 6.4 gbps same as max
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Symbols Speed Measurements for Buses & Drives
KB/s or KBps KiloBytes per Second = 210 bytes per
second
MB/s or MBps MegaBytes per Second = 220 bytes per
second
GB/s or GBps GigaBytes per Second = 230 bytes per
second
n/a not applicable, meaning "no longer used"
Symbols Binary Corrected Speed Measurements
KiB/s KibiBytes per Second = 210 bytes per
second
MiB/s MebiBytes per Second = 220 bytes per
second
GiB/s GibiBytes per Second = 230 bytes per
second
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Mobile Computer Buses - Device Bay Ports see also
PCMCIA, ExpressCard
PCMCIA [16-bit bus @ 8 MHz] PC Card (original) 8 mbps
varies 0.95 MiB/s
CardBus [32-bit bus @ 33 MHz] PC Card - Type II (most
common) 132 mbps varies 15.7 MiB/s
ExpressCard/34 - 34mm, 1.3W max (mobile PCI Express)
unknown unknown unknown
ExpressCard/54 - 54mm, 2.1W max (mobile PCI Express)
unknown unknown unknown
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Desktop Computer Buses - Internal Device
Connection
ISA bus [8-bits wide @ 4.77 MHz] (Original ISA, matches
the Intel 8088 4.77 MHz CPU) 4.7 MB/s varies 4.55 MiB/s
ISA XT bus [8-bits wide @ 6.66 MHz] 6.6 MB/s varies
6.36 MiB/s
ISA XT bus [8-bits wide @ 8.33 MHz] 8.3 MB/s varies
7.95 MiB/s
ISA AT bus [16-bits wide @ 6.66 MHz] (IBM AT type PC
using an Intel 80286) 13.3 MB/s varies 12.72 MiB/s
ISA AT bus [16-bits wide @ 8.33 MHz] (IBM 286 and
later, created in 1984) 16.6 MB/s varies 15.89 MiB/s
MCA - Micro Channel Architecture [32-bits @ 8.33 MHz]
(IBM's Bus, replaced by PCI) 33.3 MB/s varies 31.79
MiB/s
EISA - Extended ISA [32-bits wide @ 8.33 MHz] (Compaq's
Bus, replaced by PCI) 33.3 MB/s varies 31.79 MiB/s
VLB - VESA Local Bus [32-bits @ 33 MHz] (Common 486
bus, replaced by PCI then AGP) 133 MB/s varies 127 MiB/s
PCI - Conventional - Desktop Bus
PCI-32, 25 [32-bits wide @ 25 MHz] 100 MB/s varies 95.4
MiB/s
PCI-32, 30 [32-bits wide @ 30 MHz] 120 MB/s varies 114
MiB/s
PCI-32, 33 [32-bits wide @ 33 MHz] (Standard PCI, most
common since 1994) 133 MB/s varies 127 MiB/s
PCI-32, 66 [32-bits wide @ 66 MHz] (Limited, server &
workstation use) 266 MB/s varies 254 MiB/s
PCI-64, 33 v1.0 [64-bits wide @ 33 MHz] (Limited,
server & workstation use) 266 MB/s varies 254 MiB/s
PCI-64, 66 v2.1 [64-bits wide @ 66 MHz] (Limited,
server & workstation use) 533 MB/s varies 509 MiB/s
PCI-X - Server and Workstation Bus
PCI-X 66 [64-bits wide @ 66 MHz] (Limited, server &
workstation use) 533 MB/s varies 509 MiB/s
PCI-X 100 [64-bits wide @ 100 MHz] (Limited, server &
workstation use) 800 MB/s varies 763 MiB/s
PCI-X 133 [64-bits wide @ 133 MHz] (Limited, server &
workstation use) 1.066 GB/s varies 1017 MiB/s
PCI-X 266 (PCI-X 2.0, DDR) [64-bits @ 2*133 MHz]
(Limited, server & workstation use) 2.133 GB/s will
vary 2034 MiB/s
PCI-X 533 (PCI-X 2.0, QDR) [64-bits @ 4*133 MHz]
(Limited, server & workstation use) 4.266 GB/s will
vary 4069 MiB/s
PCI-E - PCI Express - Future Bus see also PCI-SIG, PCI
Express Developers
PCI Express X01 [Serial (1-bit) 2.5GHz * 01ch, 0.8V]
(replacing PCI) 250 MB/s* 200 MB/s
PCI Express X02 [Serial (1-bit) 2.5GHz * 02ch, 0.8V]
500 MB/s* 400 MB/s
PCI Express X04 [Serial (1-bit) 2.5GHz * 04ch, 0.8V]
(competing with PCI-X 1.0) 1.0 GB/s* 800 MB/s
PCI Express X08 [Serial (1-bit) 2.5GHz * 08ch, 0.8V]
(competing with PCI-X 2.0) 2.0 GB/s* 1.6 GB/s
PCI Express X16 [Serial (1-bit) 2.5GHz * 16ch, 0.8V]
164-pin, 75W (replacing AGP) 4.0 GB/s* 3.2 GB/s
PCI Express X32 [Serial (1-bit) 2.5GHz * 32ch, 0.8V]
8.0 GB/s* 6.4 GB/s
*Note: PCI Express 10-bit packet: 8 data bits, 2 CRC
bits; 8b/10b bit rate = 80% of max
Regardless, PCI Express is a bi-directional packet bus
with advanced error handling.
Computer Video Bus - AGP - Accelerated Graphics Port
see also IDE - Integrated Drive Electronics and general
ATA standards
AGP 1x, 3.3V, AGP 1.0 [32-bits wide @ 1 * 66 MHz] 266
MB/s varies 0.25 GiB/s
AGP 2x, 3.3V, AGP 1.0 [32-bits wide @ 2 * 66 MHz] 533
MB/s varies 0.50 GiB/s
AGP 2x, 1.5V, AGP 2.0 [32-bits wide @ 2 * 66 MHz] 533
MB/s varies 0.50 GiB/s
AGP 4x, 1.5V, AGP 2.0 [32-bits wide @ 4 * 66 MHz] 1066
MB/s varies 0.99 GiB/s
AGP 8x, 0.8V, AGP 3.0 [32-bits wide @ 8 * 66 MHz] 2133
MB/s varies 1.99 GiB/s
Note: AGP provides 25W power (typical); 42W max
(rare), power to the slot.
AGP Pro 2x, AGP 1.0 [32-bits wide @ 2 * 66 MHz] 533
MB/s varies 0.50 GiB/s
AGP Pro 4x, AGP 2.0 [32-bits wide @ 4 * 66 MHz] 1066
MB/s varies 0.99 GiB/s
AGP Pro 8x, AGP 3.0 [32-bits wide @ 8 * 66 MHz] 2133
MB/s varies 1.99 GiB/s
Note: AGP Pro terms: Pro/50 means 50W, Pro/110 means
110W, total power to slot.
AGP-64 4x, AGP-64 v1.0 [64-bits wide @ 4 x 66 MHz]
(cancelled due to PCI Express) 2133 MB/s cancelled 1.99
GiB/s
AGP-64 8x, APG-64 v2.0 [64-bits wide @ 8 x 66 MHz]
(cancelled due to PCI Express) 4266 MB/s cancelled 3.97
GiB/s
DRAM - Dynamic Random Access Memory
8 MHz DRAM 30pin SIMM @ 8.33MHz on a 16-bit parallel
bus 16.6 MB/s varies 15.89 MiB/s
QC DRAM - Quad Channel DRAM Bus
Quad Channel 30pin SIMMs (4 * 16-bit SIMMs on a 8.33
MHz bus) 66.6 MB/s varies 63.6 MiB/s
EDO & FPM DRAM - Extended Data Output & Fast Page Mode
DRAM (modules)
33 MHz DRAM 72pin SIMM @ 33MHz on a 32-bit parallel bus
133 MB/s varies 127 MiB/s
50 MHz DRAM 72pin SIMM @ 50MHz on a 32-bit parallel bus
200 MB/s varies 191 MiB/s
60 MHz DRAM 72pin SIMM @ 60MHz on a 32-bit parallel bus
240 MB/s varies 229 MiB/s
66 MHz DRAM 72pin SIMM @ 66MHz on a 32-bit parallel bus
266 MB/s varies 254 MiB/s
DC DRAM - Dual Channel EDO & FPM DRAM (bus
bandwidths)
Dual Channel 72pin SIMMs (2 * 32-bit SIMMs on a 50 MHz
bus) 400 MB/s varies 381 MiB/s
Dual Channel 72pin SIMMs (2 * 32-bit SIMMs on a 60 MHz
bus) 480 MB/s varies 458 MiB/s
Dual Channel 72pin SIMMs (2 * 32-bit SIMMs on a 66 MHz
bus) 533 MB/s varies 509 MiB/s
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SDRAM - Synchronous Dynamic Random Access Memory (& bus
bandwidths)
66 MHz SDRAM 168pin 1 DIMM @ 66MHz on a 64-bit parallel
bus 533 MB/s varies 509 MiB/s
PC100 SDRAM 168pin 1 DIMM @ 100MHz on a 64-bit parallel
bus 800 MB/s varies 763 MiB/s
PC133 SDRAM 168pin 1 DIMM @ 133MHz on a 64-bit parallel
bus 1066 MB/s varies 1017 MiB/s
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DDR SDRAM - Double Data Rate SDRAM (modules) (Single
Channel)
DDR200 (PC1600) SDRAM 184pin 1 DIMM @ 2*100MHz on a
64-bit parallel bus 1.600 GB/s varies 1.49 GiB/s
DDR266 (PC2100) SDRAM 184pin 1 DIMM @ 2*133MHz on a
64-bit parallel bus 2.133 GB/s varies 1.99 GiB/s
DDR300 (PC2400) SDRAM 184pin 1 DIMM @ 2*150MHz on a
64-bit parallel bus 2.400 GB/s varies 2.24 GiB/s
DDR333 (PC2700) SDRAM 184pin 1 DIMM @ 2*166MHz on a
64-bit parallel bus 2.666 GB/s varies 2.48 GiB/s
DDR366 (PC3000) SDRAM 184pin 1 DIMM @ 2*183MHz on a
64-bit parallel bus 3.000 GB/s varies 2.73 GiB/s
DDR400 (PC3200) SDRAM 184pin 1 DIMM @ 2*200MHz on a
64-bit parallel bus 3.200 GB/s varies 2.98 GiB/s
DDR433 (PC3500) SDRAM 184pin 1 DIMM @ 2*216MHz on a
64-bit parallel bus 3.466 GB/s varies 3.15 GiB/s
DDR466 (PC3700) SDRAM 184pin 1 DIMM @ 2*233MHz on a
64-bit parallel bus 3.733 GB/s varies 3.48 GiB/s
DDR500 (PC4000) SDRAM 184pin 1 DIMM @ 2*250MHz on a
64-bit parallel bus 4.000 GB/s varies 3.73 GiB/s
DCDDR - Dual Channel, Double Data Rate (bus bandwidths)
(Dual Channel)
Dual Channel DDR200 (two PC1600 64-bit DIMMs on a 2*100
MHz bus) 3.200 GB/s varies 2.98 GiB/s
Dual Channel DDR266 (two PC2100 64-bit DIMMs on a 2*133
MHz bus) 4.266 GB/s varies 3.97 GiB/s
Dual Channel DDR300 (two PC2400 64-bit DIMMs on a 2*150
MHz bus) 4.800 GB/s varies 4.47 GiB/s
Dual Channel DDR333 (two PC2700 64-bit DIMMs on a 2*166
MHz bus) 5.333 GB/s varies 4.97 GiB/s
Dual Channel DDR366 (two PC3000 64-bit DIMMs on a 2*183
MHz bus) 6.000 GB/s varies 5.46 GiB/s
Dual Channel DDR400 (two PC3200 64-bit DIMMs on a 2*200
MHz bus) 6.400 GB/s varies 5.96 GiB/s
Dual Channel DDR433 (two PC3500 64-bit DIMMs on a
2*216 MHz bus) 6.933 GB/s varies 6.46 GiB/s
Dual Channel DDR466 (two PC3700 64-bit DIMMs on a
2*233 MHz bus) 7.466 GB/s varies 6.95 GiB/s
Dual Channel DDR500 (two PC4000 64-bit DIMMs on a
2*250 MHz bus) 8.000 GB/s varies 7.45 GiB/s
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DDR2 SDRAM - Double Data Rate 2 SDRAM (modules)
(Single Channel)
DDR2-400 (PC2-3200) SDRAM 184pin 1 DIMM @ 2*200MHz on
a 64-bit parallel bus 3.200 GB/s varies 2.98 GiB/s
DDR2-533 (PC2-4200) SDRAM 184pin 1 DIMM @ 2*266MHz on
a 64-bit parallel bus 4.266 GB/s varies 3.97 GiB/s
DDR2-667 (PC2-5300) SDRAM 184pin 1 DIMM @ 2*333MHz on
a 64-bit parallel bus 5.333 GB/s varies 4.97 GiB/s
DCDDR2 - Dual Channel, Double Data Rate 2 (bus
bandwidths) (Dual Channel)
Dual Channel DDR2-400 (two PC2-3200 64-bit DIMMs on a
2*200 MHz bus) 6.400 GB/s varies 5.96 GiB/s
Dual Channel DDR2-533 (two PC2-4200 64-bit DIMMs on a
2*266 MHz bus) 8.533 GB/s varies 7.95 GiB/s
Dual Channel DDR2-667 (two PC2-5300 64-bit DIMMs on a
2*333 MHz bus) 10.67 GB/s varies 9.93 GiB/s
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Rambus or RDRAM - Rambus Dynamic Random Access Memory
(modules) (Single Channel)
PC0600 RDRAM 184pin 1 RIMM1200 @ 2*300MHz on a 16-bit
serial bus @ 4*100MHz 1.200 GB/s varies 1.12 GiB/s
PC0700 RDRAM 184pin 1 RIMM1400 @ 2*350MHz on a 16-bit
serial bus @ 4*100MHz 1.400 GB/s varies 1.30 GiB/s
PC0800 RDRAM 184pin 1 RIMM1600 @ 2*400MHz on a 16-bit
serial bus @ 4*100MHz 1.600 GB/s varies 1.49 GiB/s
PC1066 RDRAM 184pin 1 RIMM2100 @ 2*533MHz on a 16-bit
serial bus @ 4*133MHz 2.133 GB/s varies 1.99 GiB/s
PC1200 RDRAM 184pin 1 RIMM2400 @ 2*600MHz on a 16-bit
serial bus @ 4*200MHz 2.400 GB/s will vary 2.24 GiB/s
PC0800 RDRAM 232pin 1 RIMM3200 @ 2*400MHz on a 32-bit
serial bus @ 4*100MHz 3.200 GB/s varies 2.98 GiB/s
PC1066 RDRAM 232pin 1 RIMM4200 @ 2*533MHz on a 32-bit
serial bus @ 4*133MHz 4.266 GB/s varies 3.97 GiB/s
PC1200 RDRAM 232pin 1 RIMM4800 @ 2*600MHz on a 32-bit
serial bus @ 4*200MHz 4.800 GB/s will vary 4.47 GiB/s
Rambus or RDRAM - Rambus Memory (bus bandwidths) (Dual
Channel)
Dual Channel PC0600 (two 16-bit RIMM1200s on a 4*100
MHz bus) 2.400 GB/s varies 2.24 GiB/s
Dual Channel PC0700 (two 16-bit RIMM1400s on a 4*100
MHz bus) 2.800 GB/s varies 2.61 GiB/s
Dual Channel PC0800 (two 16-bit RIMM1600s on a 4*100
MHz bus) 3.200 GB/s varies 2.98 GiB/s
Dual Channel PC1066 (two 16-bit RIMM2100s on a 4*133
MHz bus) 4.266 GB/s varies 3.97 GiB/s
Dual Channel PC1200 (two 16-bit RIMM2400s on a 4*200
MHz bus) 4.800 GB/s will vary 4.47 GiB/s
Quad Channel PC1200 (four 16-bit RIMM2400s on a 4*200
MHz bus) 9.600 GB/s will vary 8.94 GiB/s
Single Channel PC0800 (one 32-bit RIMM3200s on a 4*100
MHz bus) 3.200 GB/s varies 2.98 GiB/s
Single Channel PC1066 (one 32-bit RIMM4200s on a 4*133
MHz bus) 4.266 GB/s varies 3.97 GiB/s
Single Channel PC1200 (one 32-bit RIMM4800s on a 4*200
MHz bus) 4.800 GB/s will vary 4.47 GiB/s
Dual Channel PC1200 (two 32-bit RIMM4800s on a 4*200
MHz bus) 9.600 GB/s will vary 8.94 GiB/s
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Read Speeds for Floppy Disk Drives (see also Floppy
Drive Specs)
5.25 in 3.5 in These speeds refer to all formats of
Floppy Disk Drives.
300rpm 300rpm 1x, 250kbps - base rate for current (and
last) gen of FDDs. 0.03 MB/s varies 0.03 MiB/s
360rpm 300rpm 2x, 500kbps - fastest, best Floppy speed
you can hope for. 0.06 MB/s varies 0.06 MiB/s
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Read Speeds for Optical Drives (see also CD and DVD FAQ
& CD speed ratings)
CD DVD These speeds refer to all formats of CDs and
DVDs.
1x --- CD base rate is 150 KB/s 0.15 MB/s varies 0.14
MiB/s
2x --- "Dual speed CD" (a term no longer used) 0.3 MB/s
varies 0.28 MiB/s
4x --- "Quad speed CD" (also a term no longer used) 0.6
MB/s varies 0.56 MiB/s
8x --- 1.2 MB/s varies 1.12 MiB/s
9x 1x DVD base rate is 1350 KB/s (1x DVD = 9x CD speed)
1.35 MB/s varies 1.26 MiB/s
12x --- 1.8 MB/s varies 1.68 MiB/s
16x --- 2.4 MB/s varies 2.24 MiB/s
18x 2x 2.7 MB/s varies 2.51 MiB/s
20x 2.4x 3.0 MB/s varies 2.79 MiB/s
24x --- 3.6 MB/s varies 3.35 MiB/s
32x --- 4.8 MB/s varies 4.47 MiB/s
36x 4x 5.4 MB/s varies 5.03 MiB/s
40x --- 6.0 MB/s varies 5.59 MiB/s
48x --- 7.2 MB/s varies 6.71 MiB/s
52x --- 52x CD is currently the fastest CD WRITE speed
7.8 MB/s varies 7.26 MiB/s
56x --- 56x CD is currently the fastest CD READ speed
8.4 MB/s varies 8.01 MiB/s
72x 8x 10.8 MB/s varies 10.1 MiB/s
76x 8.5x 11.4 MB/s varies 11.0 MiB/s
108x 12x 16.2 MB/s varies 15.1 MiB/s
144x 16x 16x DVD is the fastest DVD READ and WRITE
speed 21.6 MB/s varies 20.1 MiB/s
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ATA - Advanced Technology Attachment
see also IDE - Integrated Drive Electronics and general
ATA standards
ATA, IDE 5.0 MB/s varies 4.8 MiB/s
ATA-2, IDE, Mode 1 (Legacy Standard) 10.0 MB/s varies
9.5 MiB/s
ATA-2, EIDE, Mode 2 DMA (MW-DMA; Multi-Word DMA) 16.6
MB/s varies 15.9 MiB/s
ATA-2, EIDE, Mode 4 PIO (PIO-4; Programmed
Input/Output) 16.6 MB/s varies 15.9 MiB/s
ATA/16, UltraDMA mode 0, ATA/ATAPI-4 16.6 MB/s varies
15.9 MiB/s
ATA/25, UltraDMA mode 1, ATA/ATAPI-4 25.0 MB/s varies
23.8 MiB/s
ATA/33, UltraDMA mode 2, ATA/ATAPI-4 * Max for Optical
Drives (CD, DVD)* 33.3 MB/s varies 31.8 MiB/s
ATA/44, UltraDMA mode 3, ATA/ATAPI-5 44.4 MB/s varies
42.4 MiB/s
ATA/66, UltraDMA mode 4, ATA/ATAPI-5 66.6 MB/s varies
63.6 MiB/s
ATA/100, UltraDMA mode 5, ATA/ATAPI-6 * Max for Hard
Drives (HDD)* 100.0 MB/s varies 95.4 MiB/s
ATA/133, UltraDMA mode 6 * Unofficial, Maxtor Inc.
licensed items only * 133.3 MB/s varies 126.8 MiB/s
*Note: "ATA-6" means 48-bit addressing capable and
does not refer to drive speed.
SATA - Serial ATA (see Serial ATA Working
Group)
SATA-150 SATA I (v1.0) operates at 1.5 Gbps (8b/10b
bit rate) 150.0 MB/s varies
SATA-300 SATA II (v2.0) will operate at 3.0 Gbps
(8b/10b bit rate)*Late 2004-2005* 300.0 MB/s will vary
SATA-600 SATA III (v3.0) will operate at 6.0 Gbps
(8b/10b bit rate)*Mid 2006-2007* 600.0 MB/s will vary
*Note: SATA specs are defined using 8b/10b (bit) to
byte rates.
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SCSI - Small Computer Serial Interface (drive & bus
bandwidths)
SPI - SCSI Parallel Interface standards
see also general SCSI info and SCSI
compatibility
SCSI-1, (unnamed) - 25pin @ 5 MHz, 8-bit bus (8 devices
max) 5.0 MB/s varies 4.8 MiB/s
SCSI-1, SCSI - 50pin A @ 5 MHz, 8-bit bus (8 devices
max) 5.0 MB/s varies 4.8 MiB/s
SCSI-2, Wide SCSI - 68pin P @ 10 MHz, 16-bit bus (16
devices max) 10.0 MB/s varies 9.5 MiB/s
SCSI-2, Fast SCSI - 50pin A @ 10 MHz, 8-bit bus (8
devices max) 10.0 MB/s varies 9.5 MiB/s
SCSI-2, Fast Wide SCSI - 68pin P @ 10 MHz, 16-bit bus
(16 devices max) 20.0 MB/s varies 19.1 MiB/s
SCSI-3, Ultra SCSI - 50pin A @ 20 MHz, 8-bit bus 20.0
MB/s varies 19.1 MiB/s
SCSI-3, Ultra Wide SCSI - 68pin P @ 10 MHz, 16-bit bus
40.0 MB/s varies 38.1 MiB/s
SPI-2 (SCSI-3, Ultra2 SCSI) - 50pin A @ 40 MHz, 8-bit
bus 40.0 MB/s varies 38.1 MiB/s
SPI-2 LVD (SCSI-3, Ultra2 Wide SCSI) - 68pin P @ 40
MHz, 16-bit bus 80.0 MB/s varies 76.3 MiB/s
SPI-3 (Ultra3 SCSI, Ultra160 SCSI) - 68pin P or 80pin
SCA @ 2*40 MHz, 16-bit bus 160.0 MB/s varies 152.6
MiB/s
SPI-4 (Ultra320 SCSI) - 68pin P or 80pin SCA @ 2*80
MHz, 16-bit bus 320.0 MB/s varies 305.2 MiB/s
SPI-5 (Ultra640 SCSI) - 68pin P or 80pin SCA @ 4*80
MHz, 16-bit bus (may be cancelled) 640.0 MB/s will vary
610.4 MiB/s
FC SCSI - Fibre Channel SCSI see T10 drafts and T11
whitepapers
SCSI via Fibre Channel standards see Gigabit Fiber
Channel
FC (gen 1) - First generation Fibre Channel: 13.3,
26.6, 53.2, and 106.4 MBps duplex 106.4 MB/s varies
101.5 MiB/s
1 GbFC - SCSI over 1 Gigabit Fibre Channel (1.0625
Gbps) *1.25 GbE linkup capable 128.0 MB/s varies 122.1
MiB/s
2 GbFC - SCSI over 2 Gigabit Fibre Channel (2.1250
Gbps) *1.25 GbE linkup capable 256.0 MB/s varies 244.1
MiB/s
SAS - Serial Attached SCSI standards see also T10, SCSI
TA, SAS FAQ
SAS-03 Serial Attached SCSI - v1.0 operates at 3.0
Gbps (8b/10b bit rate) 300.0 MB/s varies
SAS-06 Serial Attached SCSI - v2.0 will operate at
6.0 Gbps (8b/10b bit rate) 600.0 MB/s will vary
SAS-12 Serial Attached SCSI - v3.0 will operate at
12.0 Gbps (8b/10b bit rate) 1.200 GB/s will vary
*Note: SAS specs are defined using 8b/10b (bit) to
byte rates; just as with SATA.
All
Information for
Reference only |
