Data Systems - Speed Chart |
Max Bandwidth (Upper Limit) |
Typical Bandwidth |
Max Bandwidth (Binary Corrected) |
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Current: March 4, 2004 by K.R. Knierim, www.techprogress.com | |||||||
Black Font = Standard Item (Past or Present), Maroon Font = Future Item | |||||||
Green Font = Decimal to Binary adjusted values (real world speed). | |||||||
Internetworking - Standards & Protocols | |||||||
Symbols | Speed Measurements | ||||||
kbps or Kbps | Kilobits per Second = 210 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" | ||||||
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Wireless Communications (Cellular Devices - Voice & Data) see also CDMA, EDGE, GSM, GPRS, TDMA |
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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) |
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PSTN -
Public Switched Telephone Network see also POTS - Plain Old Telephone Service |
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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 | |||||
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. | |||||||
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 | |||||||
802.11 | Provides 1 or 2 mbps @ 2.4 GHz using FHSS or DSSS | 2 mbps | varies | ||||
802.11a | Provides up to 54 mbps @ 5 GHz using OFDM | 54 mbps | varies | ||||
802.11b | "Wi-Fi" provides up to 11 mbps @ 2.4 GHz using only DSSS | 11 mbps | varies | ||||
802.11g | Provides up to 54 mbps @ 2.4 GHz using FHSS or DSSS | 54 mbps | varies | ||||
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 series) | |||||||
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 | |||||
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; 8/10 bits data = 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 |
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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. | |||||||
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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 | ||||
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 | ||||
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 | ||||
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*100 MHz | 1.600 GB/s | varies | 1.49 GiB/s | ||||
PC1066 RDRAM 184pin 1 RIMM2100 @ 2*533MHz on a 16-bit serial bus @ 4*133 MHz | 2.133 GB/s | varies | 1.99 GiB/s | ||||
PC1200 RDRAM 184pin 1 RIMM2400 @ 2*600MHz on a 16-bit serial bus @ 4*200 MHz | 2.400 GB/s | will vary | 2.24 GiB/s | ||||
PC0800 RDRAM 232pin 1 RIMM3200 @ 2*400MHz on a 32-bit serial bus @ 4*100 MHz | 3.200 GB/s | varies | 2.98 GiB/s | ||||
PC1066 RDRAM 232pin 1 RIMM4200 @ 2*533MHz on a 32-bit serial bus @ 4*133 MHz | 4.266 GB/s | varies | 3.97 GiB/s | ||||
PC1200 RDRAM 232pin 1 RIMM4800 @ 2*600MHz on a 32-bit serial bus @ 4*200 MHz | 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 | ||||
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 | 8x DVD is currently the fastest DVD WRITE speed | 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 currently the fastest DVD READ 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 |
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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, UATA-0, UltraDMA mode 0, ATA/ATAPI-4 | 16.6 MB/s | varies | 15.9 MiB/s | ||||
ATA/25, UATA-1, UltraDMA mode 1, ATA/ATAPI-4 | 25.0 MB/s | varies | 23.8 MiB/s | ||||
ATA/33, UATA-2, UltraDMA mode 2, ATA/ATAPI-4 * Max for Optical Drives (CD, DVD)* | 33.3 MB/s | varies | 31.8 MiB/s | ||||
ATA/44, UATA-3, UltraDMA mode 3, ATA/ATAPI-5 | 44.4 MB/s | varies | 42.4 MiB/s | ||||
ATA/66, UATA-4, UltraDMA mode 4, ATA/ATAPI-5 | 66.6 MB/s | varies | 63.6 MiB/s | ||||
ATA/100, UATA-5, UltraDMA mode 5, ATA/ATAPI-6 * Max for Hard Drives (HDD)* | 100.0 MB/s | varies | 95.4 MiB/s | ||||
ATA/133, UATA-6, UltraDMA mode 6 * Unofficial, Maxtor Inc licensed items only * | 133.3 MB/s | varies | 126.8 MiB/s | ||||
SATA - Serial ATA | |||||||
SATA/150, SATA-1, Serial ATA 1st gen * New, Serial ATA Drives* | 150.0 MB/s | varies | 143.1 MiB/s | ||||
SATA/300, SATA-2, Serial ATA 2nd gen * Future (2005) Serial ATA Drives* | 300.0 MB/s | will vary | 286.1 MiB/s | ||||
SATA/600, SATA-3, Serial ATA 3rd gen * Future (2007) Serial ATA Drives* | 600.0 MB/s | will vary | 572.2 MiB/s | ||||
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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 and www.t10.org |
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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 | 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 |
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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 and SCSI TA | |||||||
SAS 1.0 (Serial Attached SCSI) - v1.0 proposes 3.0 Gbps (future spec, not yet finalized) | 384.0 MB/s | will vary | 366.2 MiB/s | ||||
SAS 2.0 (Serial Attached SCSI) - v2.0 proposes 6.0 Gbps (future spec, not yet finalized) | 768.0 MB/s | will vary | 732.4 MiB/s |