Well the Sound Blaster audigy 4 does great. Its has its own processor and will reduce the CPU work load and can do 7.1
https://usm.channelonline.com/magnum...?id=M002981601
does great with games (I own one) I have the SE sadly, but this is the non-SE which means better sound quality and even thought your a video editor sound will find a way into it all. Plus this may increase over all system performance.