Data Systems - Speed Chart Max
Bandwidth

(Upper Limit) 		Typical
Bandwidth		 Max
Bandwidth

 (Binary
Corrected)
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"      
  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
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      
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
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 		     
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
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
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
  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, 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
  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		      
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		      
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