I have always had really bad luck with wireless keyboards and mice on computers that have USB3 connectors. When plugging the receiver mini-dongle into a USB3 port (or even near a USB3 port) both the keyboard and mouse suffer from lag and missed events.
I just gave up after a while, but when looking for something else I found this article: USB 3.0* Radio Frequency Interference on 2.4 GHz Devices on Intel's website, which reads in part:
... the noise from USB 3.0 data spectrum can be high (in the 2.4–2.5 GHz range). This noise can radiate from the USB 3.0 connector on a PC platform, the USB 3.0 connector on the peripheral device or the USB 3.0 cable. If the antenna of a wireless device operating in this band is placed close to any of the above USB 3.0 radiation channels, it can pick up the broadband noise. The broadband noise emitted from a USB 3.0 device can affect the SNR and limit the sensitivity of any wireless receiver whose antenna is physically located close to the USB 3.0 device. This may result in a drop in throughput on the wireless link.
This describes the issues I've encountered perfectly.
The question: Does anybody make a wireless kb/mouse that is immune to USB3 RFI? I have searched several times, and usually my Google-fu is quite good, but it fails me here.