Laptop Slowing Down

[parkertrumpet]

My XPS 13 (9370) with i7 8550u, 16 gb ram, and 512 gb SSD was running great. But once I hooked up a mouse and keyboard, external gpu (Razer Core X with 970) and monitor, it has severely slowed down. Any ideas?

 

[rgd1101]

what about with just the mouse and keyboard.