Mouse PS/2 vs Mouse USB

Mouse PS/2 vs Mouse USB

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What do you think is better for gaming? The ps/2 isn't an hot swappable port but it doesn't work by using polling, it use interrupts. So it's cpu consumption is less, and by using interrupts it is faster on response? no?. So why all the gaming mouses are usb?

Replies 4


honestly I feel no difference, it can be rather dependent on quality of mouse


as i know about the ps/2 ports when they are disconnected you need to turn of the pc and connect them again to work (it used be Im not sure if it is right now )

and as i know they stopped putting ps/2 port on new gaming pcs so usb is probably easier to use now


there is no different on personal use, just different kind plug. 


When you're moving your mouse all the time, you're interrupting the CPU as much as with USB. CPU load is surely minimum for today's standards, and any background application you have will probably consume more CPU.

On the other hand, PS/2 is an outdated standard that is not shipped with laptops. It is shipped yet with some desktop motherboards because the costs are low and the port enables some retrocompatibility, but when you're designing a gaming mouse, you think on the majority of your userbase, which includes laptop users that will not have a PS/2 port on their computers, so you have to make all your mice USB.

Moreover, if you actually use a USB mice with a PS/2 adapter, that will give the same performance as direct USB, only that the job of polling the mouse will be conducted by the adapter instead of the CPU, but polling will still exist, and so the responsiveness will be the same.

Lastly, a personal thoughts on the quality of the hardware you look for. There is a point where human performance gets below the hardware it uses, and it doesn't make sense to upgrade further. Say, for example, a mouse with a 500Hz polling rate. That means the mouse is sending its position details to the CPU every 2 milliseconds, yet humans can react as fast as 100 milliseconds in the best cases, so the delay between the event and your response could be 102ms. This means 1,96% of the lag will be responsibility of your mouse, and the other 98,04% will be responsibility of your brain. Make the same numbers whenever you compare mice for their polling rates and you'll see how insignificant this can become.

We want the best gaming hardware money can buy, thinking this will make a difference, yet sometimes our skill is the true cap. Get gaming hardware with great enough specs that will surely outscale your human limits, and then focus on finding comfort and functionality over power: we pay more attention to shiny and powerful than things like ergonomics, then we realise this awesome 1000Hz mouse has an annoying cable that gets in the way of our triple kills in the worse moments (because doh wireless mouse are less responsive).