隨著USB 3.0現在每年都變得越來越流行，您可能已經發現自己想知道為什麼現代計算機仍然內置了USB 2.0端口。考慮到這一點，今天的超級用戶問答帖子有一個好奇的讀者問題的答案。
今天的問答環節由SuperUser提供，這是Stack Exchange的一個細分，Stack Exchange是一個社區驅動的問答網站分組。
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):
超級用戶貢獻者Kamen Minkov，Patrick Bell和“最初的邁克西部”為我們提供了答案。首先，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.
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.
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.
圖片來源：安靜！ Silent Base 600案例回顧（YouTube）