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| Advantages of USB Keyboard over PS/2 Keyboard? https://www.wsgf.org/phpBB3/viewtopic.php?f=72&t=21481 |
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| Author: | Emoz93 [ 07 Feb 2011, 08:54 ] |
| Post subject: | Advantages of USB Keyboard over PS/2 Keyboard? |
I'm currently using Logitech Classic Keyboard. It uses PS/2 input instead of USB. Recently I saw another Logitech Classic model but with USB support, selling only RM3 more than than the PS/2 model. Both models are identical: spill-resistant, height-adjustable and have no special features like mutimedia hotkeys, macros, LED backligthing etc. They're just standard keyboards. I'm just wondering if it's worth buying the USB model & sell my current keyboard as 2nd-hand? Is there any advantage of using USB keyboard over PS/2, in FPS games or typing? |
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| Author: | suiken_2mieu [ 07 Feb 2011, 09:26 ] |
| Post subject: | Re: Advantages of USB Keyboard over PS/2 Keyboard? |
In general, usb is more supported on other devices. But PS/2 can always be recognized in bios. I had some issues with my usb keyboars not being recognized because they were attached to a hub. |
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| Author: | DaFox [ 07 Feb 2011, 09:53 ] |
| Post subject: | Re: Advantages of USB Keyboard over PS/2 Keyboard? |
Technically speaking PS/2 is superior. So no there is absolutely no reason to replace your keyboard with a USB one. That being said theres no reason not to get a USB keyboard if you're buying one anyway. |
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| Author: | Gilly [ 07 Feb 2011, 11:16 ] |
| Post subject: | Re: Advantages of USB Keyboard over PS/2 Keyboard? |
Yeah, PS/2 is actually "better" as there is no polling rate as such, whereas USB (by default) polls every 8ms (125Hz). |
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| Author: | MobsterOO7 [ 07 Feb 2011, 17:06 ] |
| Post subject: | Re: Advantages of USB Keyboard over PS/2 Keyboard? |
I'm not sure why nobody has mentioned ghosting yet. My old PS/2 keyboard couldn't handle more than two keys at once being pressed. http://www.microsoft.com/appliedsciences/AntiGhostingExplained.mspx |
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| Author: | suiken_2mieu [ 07 Feb 2011, 20:50 ] |
| Post subject: | Re: Advantages of USB Keyboard over PS/2 Keyboard? |
I'm not sure why nobody has mentioned ghosting yet. My old PS/2 keyboard couldn't handle more than two keys at once being pressed. You didn't get one of those awesome mechanical keyboards that allow for all the keys to be pressed and all be recognized. |
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| Author: | Emoz93 [ 08 Feb 2011, 14:45 ] |
| Post subject: | Re: Advantages of USB Keyboard over PS/2 Keyboard? |
Yeah, PS/2 is actually "better" as there is no polling rate as such, whereas USB (by default) polls every 8ms (125Hz). I don't understand what poll rate is... I'm not sure why nobody has mentioned ghosting yet. My old PS/2 keyboard couldn't handle more than two keys at once being pressed. Seems like ghosting is more due to the keyboard's internal wiring rather than the I/O type |
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| Author: | Paradigm Shifter [ 08 Feb 2011, 15:33 ] |
| Post subject: | Re: Advantages of USB Keyboard over PS/2 Keyboard? |
Poll rate is basically how often the PC queries the device for a status update/data transmit. USB keyboards are inferior to PS/2 ones, at least in raw terms. In reality, USB keyboards can do more because you can provide more power down a USB connection than you can via PS/2, so integrated LCDs, backlights, thousands of extra knobs, buttons switches and other junk can be crammed on in the name of 'ergonomics' or 'gaming'. |
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| Author: | Emoz93 [ 09 Feb 2011, 14:05 ] |
| Post subject: | Re: Advantages of USB Keyboard over PS/2 Keyboard? |
Status update every 8ms? That's 125 times per second! Sounds like a lot of work for the PC. |
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| Author: | Paradigm Shifter [ 09 Feb 2011, 14:46 ] |
| Post subject: | Re: Advantages of USB Keyboard over PS/2 Keyboard? |
Um... not really. Bear in mind that 1GHz = 1,000,000,000 cycles per second. |
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