Animation Lag with Dual 4k's on a Maxed Out 2016 13" MBP

[Phatalbert1000]

Hey, all!
As the title states, my maxed out 2016 MBP gets pretty laggy when connected to dual 4k's at 60hz, primarily when resizing or moving windows, and especially when I activate Mission Control. I also do a lot of screen clips through Evernote, and dragging the selector is painfully slow.
Monitors are connected on the Caps Lock side of the computer via two DisplayPort adapters.
Is this just what I get for not getting a 15" with discrete graphics?
Thanks in advance!

 

[Brookzy]

Is this just what I get for not getting a 15" with discrete graphics?

Pretty much. It's a lot of pixels to push for integrated graphics.

What displays are you using by the way?

 

[Phatalbert1000]

I've got two Dell 2715Q's: https://www.amazon.com/Dell-Monitor...F8&qid=1492025867&sr=8-1&keywords=dell+4k+27"
These are the adapters I'm using: https://www.amazon.com/Cable-Matter...25913&sr=8-4&keywords=display+port+usb+c&th=1

Another potentially interesting point is that that performance seems pretty much the same regardless of which set of ports I hook the screens up to, even though the Caps Lock side is recommended for running 4k's.

 

[Brookzy]

Another potentially interesting point is that that performance seems pretty much the same regardless of which set of ports I hook the screens up to, even though the Caps Lock side is recommended for running 4k's.

Where did you read that?

 

[Phatalbert1000]

Where did you read that?

Here: https://support.apple.com/en-us/HT207256

MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports) supports Thunderbolt 3 at full performance using the two left-hand ports. The two right-hand ports deliver Thunderbolt 3 functionality, but have reduced PCI Express bandwidth.

 

[Brookzy]

Here: https://support.apple.com/en-us/HT207256

MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports) supports Thunderbolt 3 at full performance using the two left-hand ports. The two right-hand ports deliver Thunderbolt 3 functionality, but have reduced PCI Express bandwidth.

Oh, I see. This refers to the fact that the left two ports support full Thunderbolt 3 speeds but the right are limited to around (I believe) 20 Gbps. But all the ports provide full USB-C capabilities, so there is no difference for non-Thunderbolt 3 devices such as 4K displays.

 

[Phatalbert1000]

Sorry to refresh an old thread, but I'm still tinkering with my setup.
Is it possible to lower the refresh rate of the monitors to something like 45hz? 30hz is a little choppy, but the overall GUI performance is better (I tested this by hooking up via HDMI instead of DisplayPort). I've tried using cscreen but can't successfully get it to change the refresh rate of the monitors. I also don't see an option in display preferences or the dell monitors.
Thanks!