[FaDeHellfyre]

streaming is ridiculously cpu heavy. My computer specs are as follows

CPU: Core i7-2600K 3.4GHz
RAM: 16.0 GB DDR3
GFX: 2x Radeon HD6850's (running in crossfire)
MOBO: Asus P8Z68 Deluxe

My screen is 1920x1080 (the one i have sc2 on), and to stream in a reasonable quality while still having non-lag filled gameplay i had to;

Reduce graphics settings to medium (high is pointless anyway).
Put the stream on lowest HD setting possible. (1920x1080 was impossible, it wouldn't even move off the first frame, let alone 60fps).

All in all it worked alright, though I had mine set to 39.95 frames per second. You shouldn't need to go 60fps. It's a video game, and human eyes can only see around 24fps, so any more than that is just an increase in quality. If you're looking to stream at that, in a HD quality, you're probably looking at a hardcore PC worth a lot of money.