Question / Help Network lag and ping spikes while streaming

[DWFreeway]

So I recently upgraded my internet here in Chicago to AT&Ts new 'power' plan which is rated up to 45 mb down and 6 mb up.
http://www.speedtest.net/my-result/2942519690
http://testmy.net/QvJXNKl.png

The one game that this issue pertains to is Counterstrike global offensive

The problem is, as soon as I start streaming , my ping starts going crazy and spiking up and down by +30-70 ms very quickly and the game generally feels a bit unresponsive on and off.

My speedtests have been completely consistent, and I even called up AT&T and confirmed with them that they saw no problems on their end, and I'd like to add that I have zero dropped frames in OBS

Latest OBS Log: http://pastebin.com/u55FwjDs

I've noticed the two settings in OBS 'minimize network impact' and 'automatic low latency mode,' but I'm not sure if I should be using those.

I've tried a range of 2000 bitrate up to 3000 and still have lag both ways, and on top of that I notice my actual bitrate in OBS spike well above my set max even though I have CBR enabled.

PC Spec:
i7 3770k @ 4.5 ghz
gtx 670
16 gb ram

 

[DWFreeway]

checking 'minimize network impact' seems to have fixed my lag, though the box in the bottom right of obs flashes from green to yellow very quickly every so often now

 

[Krazy]

Yellow isn't too big a deal, even red is fine if it's only very briefly and you never actually drop frames. Yellow just means the buffer is starting to get full, while red means the buffer IS full.