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Important mouse information for people that own a new Gigabyte board like Z77x UD5H

post #1 of 3
Thread Starter 
The F8 BIOS patch notes for the UD5H lists "Improve keyboard compatibility". Apparently there was some kind of issue with logitech "gaming" keyboards and they screwed around with USB stuff. I'm pretty sure they did this change to several other Gigabyte models and the mouse response went to crap due to this change.

If you want the mouse to feel correct, you need to not upgrade to the newer BIOS versions and use F7 for the UD5H in particular, while it will be different number for the other Gigabyte boards. I listed more information in this post:

http://www.overclock.net/t/1239993/gigabyte-z77x-owners-discussion-information-support-thread-and-club-ud5h-ud3h-d3h-and-all/5970#post_20677418

I don't really know anything about the new Haswell boards, so can't help you there.
post #2 of 3
Do you have options in bios called "Legacy support for mouse" "Legacy support for keyboard" or smth like that. What do they do? Is it better to turn it on?
post #3 of 3
Thread Starter 
It's enabled by default on mine, I usually leave it on. I believe this setting uses an IRQ/Shared IRQ for PS2 port emulation. I run a barebones system with everything disabled that I don't use, so that might be why I've never had a problem or noticed much difference with this setting.

There is not much documentation if having this turned on introduces a permanent layer between USB and your system that always intercepts and buffers calls, or if it's a pre-boot, hand off type thing that does nothing after you enter the OS.

In the past, I actually have noticed a slight difference with this off, the cursor seemed to have felt a little looser/faster, but many BIOS reconfigure all your system resources, IRQs, etc, by the act of hitting Save & Exit alone. So it's hard to pin down specific settings like this unless they have a drastic effect like HPET.
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