Although a bit late to the punch in replying, my main board had Killer on it and I am not a big fan of it - constant problems with the drivers in comparison with the onboard Intel ethernet adapter. Would have preferred two of those. The types of issues are kind of unexplainable, weird problems, but mostly, I found that the rate limiting software was mostly useless for my purposes, at times the driver itself was causing BSODs, and I ultimately just turned the thing off in the BIOS. It could be I am just one of the unlucky few with this adapter, but somehow I doubt it. Intel constantly updates their driver support for their network adapters and I am quite satisfied with the performance. When comparing WAN speeds using SpeedTest I even found the Intel adapter to be more effective. I agree wholeheartedly with this assessment, unfortunately.