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USB 3.0 and USB 2.0

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March 9, 2014 7:10:50 PM

Hey guys! I just received my parts from newegg and before I start, I wanted had a question. Well, I have a Antec 900 case and I had a question about the USB 3.0 and USB 2.0. This is going to be my second time building this computer because I already helped my friend build his a week ago. From what I remember, he had the USB 3.0 AND the USB 2.0 connected to the motherboard because they were separate cables. He had the AZZA 1000R case. For some reason, my USB 3.0 and 2.0 are connected together into one cable and it says that only one of them has to be connected. Is that true? Is it supposed to be like that? If so, which one should I use? Will it effect/damage anything? Here are my parts that I'm getting.

Motherboard: Asus Z87 Plus
CPU: I7 4770k
GPU: Gtx 760
Cooler: Hyper 212 Evo
Ram: G.skill sniper series 8gb
Power supply: RM 750w Power supply
Hard drive: Western Digital Caviar Black 1TB
Optical Drive: Asus drive

More about : usb usb

March 9, 2014 7:27:17 PM

Well if they are connected together then what other option do you have. If it says that one of them needs to be connected then obviously go ahead and connect it. There is no one way about anything, it just depends on your case and how many connections it has. Nothing will be effected or damaged. Best of luck :) 

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March 9, 2014 7:34:35 PM

Well is mine common or is it separate cables most of the time?
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March 9, 2014 7:34:48 PM

Usually when that is the case, the cable is from the USB 3.0 ports. But since USB 3.0 is backward compatible with USB 2.0, they offer a 2.0 plug in case your MB has no 19 pin USB 3.0 header.
If your MB has the USB 3.0 header, use that. If not, use the smaller connector and plug it into the 2.0 header. Not both!
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March 9, 2014 7:48:40 PM

clutchc said:
Usually when that is the case, the cable is from the USB 3.0 ports. But since USB 3.0 is backward compatible with USB 2.0, they offer a 2.0 plug in case your MB has no 19 pin USB 3.0 header.
If your MB has the USB 3.0 header, use that. If not, use the smaller connector and plug it into the 2.0 header. Not both!


Okay, I understand, but I want to know which is more common. Are mine common or separate cables common? Oh and lets say you have separate 2.0 and 3.0 connectors, would you still use both to plug into motherboard or only one of them?
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March 9, 2014 7:53:38 PM

sarus345 said:
clutchc said:
Usually when that is the case, the cable is from the USB 3.0 ports. But since USB 3.0 is backward compatible with USB 2.0, they offer a 2.0 plug in case your MB has no 19 pin USB 3.0 header.
If your MB has the USB 3.0 header, use that. If not, use the smaller connector and plug it into the 2.0 header. Not both!


Okay, I understand, but I want to know which is more common. Are mine common or separate cables common? Oh and lets say you have separate 2.0 and 3.0 connectors, would you still use both to plug into motherboard or only one of them?


No, you never want to use both. I don't know if it would do any harm, but it may cause driver conflicts.
The most common until recently was for the 3.0 ports to have just the 3.0 connector. Sometimes they would include a 3.0 to 2.0 adapter separately . But as manufacturers become more savvy, they have been going to a more economical combo-connection like yours has.
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