La séance de questions et réponses d’aujourd’hui nous est offerte par SuperUser, une sous-division de Stack Exchange, un groupe de sites Web de questions-réponses dirigé par la communauté.
La question
Le lecteur SuperUser, Brettetete, veut savoir pourquoi les ordinateurs modernes disposent toujours de ports USB 2.0:
I am currently planning out the setup for a new computer. As I was browsing through computer cases online, I realized that modern computer cases always seem to have USB 2.0 and 3.0 ports built into the front panel.
Is there a legitimate reason to have or use USB 2.0 ports on modern computer cases? As far as I know, USB 3.0 has backward compatibility. This screenshot is a perfect example of a computer case with both types of USB ports built into it (from YouTube):
Pourquoi les ordinateurs modernes ont-ils encore des ports USB 2.0?
La réponse
Les contributeurs de SuperUser, Kamen Minkov, Patrick Bell et «le mike western original» ont la solution pour nous. Tout d'abord, Kamen Minkov:
USB 3.0 does have backwards compatibility, but if you happen to buy a motherboard that does not have a USB 3.0 header connection, you are left without any front panel USB ports at all. That is one possible explanation.
Suivi de la réponse de Patrick Bell:
Nobody has mentioned this yet, but USB 3.0 ports can cause issues with certain installation media (like Windows 7, for example) where only USB 2.0 drivers are provided on the installation media.
Et notre réponse finale de "l'original mike western":
USB 2.0 ports are handy for keyboards, mouse controllers, and other non-drive uses. Because these devices do not need the speedy throughput, a keyboard or mouse connected to a USB 3.0 port would be a waste of the resource.
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Crédit d'image: soyez tranquille! Examen de cas Silent Base 600 (YouTube)