Subject: [Follow up] Summary of different device, etc. speeds
From: "Cannon and Nicole Smith" <can-nyk@agt.net>
Date: Wed, 11 Oct 2000 00:40:04 +1100
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Shane's Antler!
My own personal thanks to all who contributed to
this! You guys (generic) SHINE!! :)
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First a big thank you to all who pointed me to an article or gave me
information directly. I had a LOT to wade through and try to match up. I
thought this would make a nice little project and as you can see, it turned
into something fairly large. I need to put a bit of a disclaimer in here
since there was a little bit of conflicting information between different
sources so I took the liberty of putting down what made sense to me. Also,
I haven't even heard of many of these technologies so I wasn't able to
realize if they made sense of not. And some of the technologies seemed to
have different designations for the same thing, but I was never 100% sure.
And lastly, as I read in one article, we have to remember that this is the
theoretical throughput, not counting stop bits, parity bits, headers,
compression of data, line static, etc. Anyway, this was very interesting
and useful to me and hopefully it will be useful to others as well. If
anyone sees some mistakes I've made (typing or otherwise), please let me
know. Thanks.
Cannon Smith
- - - - - - - - - - - - - - - - - - - - - - - - -
First, a bit (pun intended :) ) to understand the notation used; watch
uppercase and lowercase.
1 bit is either a zero or a one
1 byte is 8 bits (the amount of bits needed to represent a character on a
page)
Most of the time in computerdom, each prefix is 1024 of the previous prefix.
For example, 1 Kb is 1024 bits and 1KB is 1024 bytes. 1 Mb is 1024 Kb and 1
MB is 1024 KB. There has seemed to be a bit of a movement toward rounding
this off to 1000 instead of 1024 at times, so keep this in mind when reading
these symbols in some places.
ps as in Kbps is for per second (Kilobits per second).
baud is equal to bps (bits per second)
Prefix |
Symbol |
Bit Notation |
Byte Notation (bit * 8) |
Equivalent to |
====== |
====== |
============ |
======================= |
============= |
kilo |
K |
Kb |
KB |
|
mega |
M |
Mb |
MB |
1024 K's |
giga |
G |
Gb |
GB |
1024 M's |
tera |
T |
Tb |
TB |
1024 G's |
peta |
P |
Pb |
PB |
1024 T's |
exa |
E |
Eb |
EB |
1024 P's |
zeta |
Z |
Zb |
ZB |
1024 E's |
yotta |
Y |
Yb |
YB |
1024 Z's |
Here's the list. In the end I decided to sort it by relative data transfer
rate (speed). Oh, I decided to add some raw speeds at the beginning to show
the difference between bps and Kbps, etc.
Carrier Technology |
Theoretical Throughput |
Transfer a 1 MB file |
=================================== |
====================== |
================ |
bps |
1 bps |
8,388,608 sec (~97 days) |
Bps |
1 Bps |
1,048,576 sec (~12 days) |
Kbps |
1 Kbps |
8,192 sec (~2 1/4 hours) |
KBps |
1 KBps |
1,024 sec (~17 minutes) |
Mbps |
1 Mbps |
8 sec |
MBps |
1 MBps |
1 sec |
Gbps |
1 Gbps |
1/128 of a sec |
GBps |
1 GBps |
1/1024 of a sec |
|
300 baud modem |
300 bps |
27,962 sec |
1200 baud modem |
1200 bps |
6,990 sec |
2400 baud modem |
2400 bps |
3,495 sec |
9600 baud modem |
9600 bps |
873 sec |
GSM mobile telephone service |
9.6 to 14.4 Kbps |
853.3 to 568.8 sec |
ADB |
10 Kbps |
819.2 sec |
14.4K modem |
14.4 Kbps |
568.9 sec |
28.8K modem |
28.8 Kbps |
284.4 sec |
POTS Regular telephone service |
Up to 56 Kbps |
Low as 146.3 sec |
Dedicated 56 Kbps on Relay |
56 Kbps |
146.3 sec |
Frame Relay |
56 Kbps to 1.544 Mbps |
146.3 to 5.1 sec |
General Packet Radio System (GPRS) |
56 to 114 Kbps |
146.3 to 71.9 sec |
One-channel ISDN |
56 to 64 Kbps |
146.3 to 128.0 sec |
56K modem |
56.6 Kbps |
144.7 sec |
DSO |
64 Kbps |
128.0 sec |
High-speed circuit-switched data service (HSCSD) |
Up to 90 Kbps |
91.0 sec |
Two-channel ISDN |
115.2 to 128 Kbps |
71.1 to 64.0 sec |
IDSL |
128 Kbps |
64.0 sec |
Serial Port |
230 Kbps |
35.6 sec |
AppleTalk (LocalTalk) |
230.4 Kbps |
35.6 sec |
Fractional T-1 |
256 Kbps |
32.0 sec |
Enhanced Data GSM Environment (EDGE) |
384 Kbps |
21.3 sec |
"384K" DSL |
384 Kbps |
21.3 sec |
Satellite (DirecPC) |
400 Kbps |
20.4 sec |
Fractional T-1 |
512 Kbps |
16.0 sec |
DSL |
512 Kbps to 8 Mbps |
16.0 to 1.0 sec |
DSL/Fractional T-1 |
768 Kbps |
10.7 sec |
Standard parallel port |
115 KBps |
8.9 sec |
DS1/T-1 |
1.544 Mbps |
5.1 sec |
Universal Mobile Telecommunications Service (UMTS) |
Up to 2 Mbps |
Low as 4.0 sec |
Geoport |
2 Mbps |
4.0 sec |
E-1 |
2.048 Mbps |
3.9 sec |
T-1C (DS1C) |
3.152 Mbps |
2.5 sec |
Token Ring/802.5 |
4 Mbps |
2.0 sec |
DS2/T-2 |
6.312 Mbps |
1.2 sec |
E-2 |
8.448 Mbps |
0.9400 sec |
Cable Modem |
Varies; about 10 Mbps |
0.8000 sec |
Ethernet |
10 Mbps |
0.8000 sec |
USB |
12 Mbps |
0.6600 sec |
IBM Token Ring/802.5 |
16 Mbps |
0.5000 sec |
SCSI 1 |
3 MBps |
0.3300 sec |
ECP/EPP parallel port |
3 MBps |
0.3300 sec |
Sustained data transfer of 1 GB hard drive/PM 7500 |
3.2 MBps |
0.3100 sec |
IDE |
3.3 to 16.7 MBps |
0.3000 to 0.0600 sec |
E-3 |
34.368 Mbps |
0.2300 sec |
SCSI 2 |
5 MBps |
0.2000 sec |
DS3/T-3 |
44.736 Mbps |
0.1700 sec |
HSSI |
Up to 53 Mbps |
Low as 0.15 sec |
OC-1 |
51.84 Mbps |
0.1400 sec |
Sustained data read of Ultra Wide SCSI IBM 9GB HD |
8.2 MBps |
0.1220 sec |
Fast SCSI 2 |
10 MBps |
0.1000 sec |
Fast Ethernet |
100 Mbps |
0.0800 sec |
FDDI |
100 Mbps |
0.0800 sec |
T-3D (DS3D) |
135 Mbps |
0.0590 sec |
E4 |
139.264 Mbps |
0.0570 sec |
OC-3/STM-1 |
155.52 Mbps |
0.0510 sec |
Wide (SCSI 3) |
20 MBps |
0.0500 sec |
Ultra (SCSI 3) |
20 MBps |
0.0500 sec |
Ultra Wide (SCSI 3) |
40 MBps |
0.0250 sec |
Firewire |
50 MBps |
0.0200 sec |
E5 |
565.148 Mbps |
0.0140 sec |
Ultra 2 (U2W or SCSI 3) |
80 MBps |
0.0125 sec |
OC-12/STM-4 |
622.08 Mbps |
0.0120 sec |
Rumored next version of Firewire |
100 MBps |
0.0100 sec |
Ethernet |
1 Gbps |
0.0070 sec |
Ultra 160/m (SCSI 3) |
160 MBps |
0.0062 sec |
OC-24 |
1.244 Gbps |
0.0060 sec |
OC-48/STM-64 |
2.488 Gbps |
0.0030 sec |
SciNet |
2.325 Gbps |
0.0030 sec |
Sytem Ram, Blue G3 |
800 MBps |
0.0012 sec |
OB-192/STM-64 |
10 Gbps |
0.0007 sec |
OC-256 |
14.271 Gbps |
0.0005 sec |
CPU to CPU, 500 MHz G4 |
8.0 GBps |
0.0001 sec |
3 1/2 drive |
?? |
?? |
5 1/4 drive |
?? |
?? |
P.S.
I haven't tried to give credit to all the sources but I should mention a lot
of the info did come from:
<http://www.whatis.com/Flat_Files/The_Speed_of/0,282006,,00.html>
This site also explains (briefly) what each technology is used for.
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