Just tried my WMO on a newer platform.. It seems that the INTEL usb 3.0 extensible drivers will BLOCK the 1000hz mod..
So.... basically on z77 z87 and z97, all the platform that use intel usb 3.0 drivers, if you install them (to use 3.0) it will not work with the older mice which need the mod to do 1000hz.
It will disable the mod on all of the usb ports and default to 125hz.
I tired with mx510, 518, WMO, IMO.
The problem is easily rectified, just buy a seperate usb3.0 addon card, and use that instead..
But if you MUST use the intel onboard usb3.0, it will block the mod.