Increase USB port sample rate to 250hz/500hz/1000hz
boost precision and improve mice accuracy

Windows XP SP2 and Windows 2000 SP4 - English version ONLY!

Support:
Logitech MX series
Microsoft IntelliMouse Explorer 3
Razer series

Instructions:
1. Restart your computer and login to Safe Mode
2. Run the utility in SAFE MODE and follow the instructions (duh!)
3. Reboot

Release Notes/Changes:
*Use it in your own risk! it may damage your motherboard or usb devices!!!
*Added support for Windows 2000 SP4 (BETA!)
*Added 1000hz (BETA! - Risky!)

And ofcourse the download link

Download USB Mouserate Switcher 0.2Beta

Use at your own risk

i've a logitech mx900 bluetooth mouse... is compatible?

it works with bluetooth connection

good tool anyway

Are such high hertz authorized in tournaments?

Of course, it depends on the organizer, but why would it be considered something like a "cheat" or unfair advantage?

A polling rate of 1 kHz is not overclocking, because technically it complies with the USB standards.

Effectively it's like overclocking the PS/2 port for mouses, but with much higher polling rates.

I think, if the mouse can handle 250 HZ, 500 Hz or even 1000 Hz it is no bad thing to benefit from these capabilities.