but i don't understand why it is lagging, i used AMD 8350 cpu when recorded mine, it was max quality 1080p 60hz, never once lagged.. the whole point with those hardware recording devices is to have box doing most of the stuff and not pc for lag free experience.
remember i also used a weak laptop in my sons room to record some minecraft for him that was also maxed quality and no lag. i did experimented with bit rate though, getting to use as low bit rate as possible without notice reduced quality in your recordings so file size would be lower, but always 60hz
i can upload a xbox recording i did.. 2-3min long. use short hdmi cable and maybe turn of sound recording in Hauppauge software in case it struggle locating sound
edit: here is 1min borderlands 2 game play from xbox 360 1080p/60
https://www.youtube.com/watch?v=QtAkC29OmKwedit: dam, it was just 30fps, will see if i got any other video recordings