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Old 02-08-2023, 06:00 AM   #37
Quoth
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Quote:
Originally Posted by Renate View Post
Watch out. Most things have gone to Type C, but all Type C is not USB 3.0+.
The latest Barnes & Noble 6" is Type C and USB 2.0
Ok, some people may not care.
I have a Canon 70D DSLR with a really fast SD card. Its mini-USB (not even micro), is faster than anything else I have, even a USB-B 3.0 SATA HDD adaptor with a 3.5" 7200 rpm disk. USB-C, USB-B or micro-USB.

Ereaders are all pretty slow, though the Sage is the fastest with Calibre. The MTP devices, even with USB-C, are the slowest.

Summary

The kind of USB connector tells you nothing about the speed.

Ethernet achieves 1000 GBps by using parallel transfer on 4 pairs at the same time each at 250 Mbps. USB only uses one pair for data (USB-C extra signalling pair is used for power configuration and optionally there are pairs with Video). Also USB only transmits or receives, half-duplex. The 1Gbps ethernet full duplex transmits and receives at the same time using echo cancellation and hybrid techniques.

USB was developed for keyboard, mouse and joystick etc and has been gradually tinkered with. It beat the superior firewire in the market as it's royalty free and fireware has a royalty. Firewire can run peer-to-peer and do networking, storage or streaming. The original version can be faster in the real world than USB 3.0.

USB is a mess.

Last edited by Quoth; 02-08-2023 at 06:09 AM.
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