problem: high Nvidia GPU
modell: Dell Laptop with dual GPU (Intel and Nvida)
with nvidia Geforce 650M rendering active high gpu load, caused from fast rotation of the animated circle in the system try or the control panel
That happens, opening a program, or the notification circle downloading or transfering a file ecc.

How can i slow down the animation (with intel gpu activated, the rotation seems normal)?

Maybe give some more information about your distribution and Plasma version...

I use Kubuntu 19.04

Plasma Version: 5.15.4

integrated Video cards:

*-display
description: VGA compatible controller
product: GK107M [GeForce GT 650M]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list
configuration: driver=nvidia latency=0
resources: irq:30 memory:f0000000-f0ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:3000(size=128)
*-display
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:27 memory:f1000000-f13fffff memory:e0000000-efffffff ioport:4000(size=64) memory:c0000-dffff

In use: nvida binary driver - 340.107

Compositor: OpenGl 2.0