USB vs PS/2 Keyboard: latency, bandwidth -> inputs per second? - Page 3 - Overclock.net - An Overclocking Community

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USB vs PS/2 Keyboard: latency, bandwidth -> inputs per second?

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post #21 of 131 (permalink) Old 10-05-2010, 06:28 PM
 
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OCN doesn't endorse Gold USB connectors I hope.
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post #22 of 131 (permalink) Old 10-05-2010, 06:34 PM
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I don't believe anyone at OCN is under the impression the difference of speed that electricity travels through gold makes a difference. Try the headphone club though, you might find someone who swears by their $300 gold plated USB cable.

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post #23 of 131 (permalink) Old 10-05-2010, 06:35 PM
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Quote:
Originally Posted by Crazy9000 View Post
I don't believe anyone at OCN is under the impression the difference of speed that electricity travels through gold makes a difference. Try the headphone club though, you might find someone who swears by their $300 gold plated USB cable.
Oh God not the cable debates.. nonononono. Have you ever read some of the discussions about cables on Head-Fi? It's like a Civil War.


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post #24 of 131 (permalink) Old 10-06-2010, 05:06 AM
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It was my impression that OCN was more about "ultimate tactile experience" and "mech superiority" rather than gold cables and vacuum tube players. Also it appears it has a random guest from geekhack now, obsessed with USB and Id's videogames. (Im not saying troll because im polite.) Though claiming that Doom 1 is one of the greatest achievements of semiconductor industry really says it all.
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post #25 of 131 (permalink) Old 10-06-2010, 05:58 AM
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Quote:
Originally Posted by dan_k View Post

* Passmark keyboard test
http://www.passmark.com/products/keytest.htm

USB:
Depress time: 355ms
Lag time: 7ms
Char/s: 125

With this diagnostic software for USB I get minimum of 7-8ms delay between each key, even if I press three or four of them in the same time, for PS/2 this delay is 4-5ms, PS/2 wins there.
This is what i got with my Logitech Access Deluxe PS/2

PS/2
Depress time: 169ms
Lag time: 3ms
Char/s: 272

Looks pretty solid, but im unsure of how relevant this is, other than that Logitech makes good hardware, but thats hardly news. But at least we have some hard facts here, hehe.


LL
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post #26 of 131 (permalink) Old 10-06-2010, 06:09 AM
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MOAR GOLD

Damn she was fast, but that's because she's all gold and blond.

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post #27 of 131 (permalink) Old 10-06-2010, 06:28 AM
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From my POV. PS/2 is faster than USB.
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post #28 of 131 (permalink) Old 10-06-2010, 06:34 AM
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From my POV. PS/2 is faster than USB.
It is faster when it comes to queue but not in transfer (MHz) speed.
The USB interface is like a hub, one signal at a time.
The PS/2 is always active while USB is inactive until it gets a queue.

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post #29 of 131 (permalink) Old 10-06-2010, 06:36 AM
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I don't understand why people prefer USB over PS/2 for ANYTHING else than hotswapping...

USB polls 1000hz... PS/2 is interrupt based, making it very much more than 1000hz....

PS/2 has NKRO. My keyboard can hit any key and have it register . I can press ALL the keys at the same time and have them register. My keyboard is PS/2....

And YOUR USB keyboard has a maximum of 6 alphanumeric keys and 4 modifiers at a time. However, it's rare for a keyboard to support this; most keyboards only support less than 3 keys at a time at certain key combinations....

The fact of the matter is: PS/2 wins for everything except hotswapping...
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post #30 of 131 (permalink) Old 10-06-2010, 06:43 AM
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