FPS spikes when streaming

[Jayburpz]

So i recently started streaming on twitch again and im getting this weird fps lag spikes about 1-2hrs into the stream.  I dont know whats the issue. At first i thought my cpu was over heating so i pulled off my cooler cleaned off the old thermal paste and appiled fresh artic mx-4 paste. I noticed some black residue on the frame supporting the cpu but didnt think much of it.  My cpu temps dropped by a good 15-20degrees and averages 50-60degrees when playing diablo 3 and streaming with obs. 

 

I wonder if its my gpu but im running a 4gb card and i have all my graphic setting either turned off or down to low except texture detail which is set to high. v-Sync is turned on. Then again, streaming is more cpu intensive rather then gpu intensive right?

 

Would be nice if someone could maybe suggest some reasons to the spikes. 

 

Intel i5 3470

Msi B75ms-p45

Zotac gtx 1050 ti oc 4gb

2x 8 gb Ripjaws ddr3 ram

 

[ARikozuM]

What recording program, games, and bitrate are you using?

 

@AlwaysFSX

[Jayburpz]

1 minute ago, ARikozuM said:

What recording program, games, and bitrate are you using?

Streaming on OBS

720P 30FPS 2500mbps

 

Only streaming diablo3 now.

[AlwaysFSX]

Set the game as a higher priority than obs in task manager? Stream might suffer but your game should run better.