Low FPS/stutter when watching Twitch streams on secondary monitor!

[fofogogo23]

Hi!

I'm running a dual Monitor setup. Main center monitor is a 144hz BenQ 2420TE and my secondary monitor to the left is some random 60hz screen.

My issue is, while I'm playing games (World of Warcraft for example) I like to watch Twitch.tv streams on my secondary monitor. However, when I do this, my in-game FPS seems to lower. The game itself's FPS counter claims the FPS has not changed but it feels much lower (~30fps?) and slightly choppy/stuttery. I'm not quite sure how to explain it.

I can't figure out what's causing this, and I doubt it's the CPU usage from Twitch as I have more than enough to handle both at the same time (I think!?). Does anybody here know what the issue could be and if/how it can be solved?

Thank you for your time.

PC specs:
Intel Core i7-4790K
Gigabyte GA-Z97X-Gaming GT
Corsair Vengeance Pro 16GB DDR3-1600
Dual Gigabyte GTX 980 4GB Windforce in 2-way SLI

EDIT: After doing some testing, it seems my FPS on my main monitor is also lower even while not playing a game (still watching twitch on second monitor). If I grab a window and drag it around it's very clearly less smooth/fluid then when Twitch isn't running on my other monitor.

 

[hang-the-9]

Online game + streaming video = slower internet connection = lag.

 

[fofogogo23]

Online game + streaming video = slower internet connection = lag.

I doubt this is the case. The issue appears on singleplayer games as well.
I'm not lagging in a ping/response time sort of way, I'm just experiencing lowered FPS and image stutters.
Plus, I have a 100 down connection.

Thank you for the suggestion, however.

 

[hang-the-9]

Test things on a single card, could be an SLI issue. Does this happen with anything you play on the second monitor or only on twitch?

 

[fofogogo23]

Test things on a single card, could be an SLI issue. Does this happen with anything you play on the second monitor or only on twitch?

It also happens with YouTube, although it's slightly less severe. Something else that's interesting, it happens when something on my taskbar on the second monitor flashes. For example when I get a steam notification, the taskbar icon for Steam flashes yellow and until I open up the notification so the icon stops flashing, I get low on my main monitor.

Tried turning SLI off, still happening.

 

[hang-the-9]

Try with one monitor only, see if that also happens when you get notifications. Are the two monitors running in different refresh rates? Try setting them both to 60 and the same resolution also.