if u put 3000-3500 bitrate and u are host, be sure that you will lag with those settings because the upload get alot spikes over the bitrate u choose to upload, and those spikes can give easily red comet (1k++ ping)
Thats not true, you can stream with 640-760(bitrate) at 480p, 900-1100 720p, 1600 at 1080p, you just need to adjust the frame rate in order to avoid blurry pixels when moving fast.
About CPU any quadcore above +2.6ghz can stream aoc in good quality, since aoc will mostly uses only one core at 90%, the other 3 cores are available to encoding the video and thats it, you deftly don't need a super machine to stream, anyway the lag with chineses is not because poor connection they must have 100mb as minimum, the problem with chines or vns lag are all the countries in between., hopefully the giant wire they are building from japan to usa will help to reduce lag in the coming years.