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In my laptop ( Lenovo - y470 ) there are three usb ports and one of those is usb 3.0 others are usb 2.0 . But i don't know which one is what. Is there a way a can figure out which port is 3.0 ?

I use device manager to confirm that i have one usb 3.0 port.

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When i copy data from my External HDD it transfers at 38MB/s from all of the usb ports.

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Is your external HDD a USB 2.0 or 3.0 one? – Journeyman Geek Jan 1 at 14:42
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According the tech specs

Left side: two USB 3.0 ports, external monitor (VGA DB-15, HDMI), ethernet (RJ-45)

Right side: one USB 2.0 port and one eSATA/USB combo port

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up vote 4 down vote

They're BLUE!

I believe USB-3 ports should be colored differently (blue)

The use of blue pantone thermoplastics in USB 3.0 connectors is recommended on systems with a mix of USB 2.0 and USB 3.0 ports. For certification, the USB-IF does require that the user be able to clearly and easily distinguish between a USB 3.0 and a USB 2.0 port on a system; however, it is left to the system implementer on how to accomplish this.

(my emphasis)

Also, just because your Computer contains a USB 3 controller doesn't mean it necessarily is presented externally

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Yup. Powered ports are yellow, USB3 are blue on lenovos – Journeyman Geek Jan 1 at 14:42
I found blue usb port in my laptop :) Thanks. Would you please care to elaborate Also, just because your Computer contains a USB 3 controller doesn't mean it necessarily is presented externally ? – Rakesh Jan 1 at 16:13
This means that although the motherboard is capable of processing USB3.0 signal, a physical port might not be installed (usually, it's the case with desktops). – dnbrv Jan 1 at 16:46
@Rakesh: Sometimes a USB controller exists for internal devices (such as a laptop's webcam). – grawity Jan 2 at 8:35
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