How to identify USB 2 and USB 3 ports on a computer

If the USB port or cable has a blue tab, it is USB That said, it's possible for a USB port or cable to be a color other than blue See this

USB is backward compatible with the older version, so there is no harm in plugging an older device into the faster port but there will not

usb 30 slot Also, with a USB , it can provide up to 900mA or , which translates into watts These power output specifications are a rating based

usb 3 slot Most computers have both USB and USB ports The images above indicates that the computer has USB An alternative way to check is to look for a blue