There are at least three ways to monitor the temperature of an nVidia GPU ( via the console:

1. $ nvidia-settings -q gpucoretemp -t

2. $ nvidia-smi -a | grep Gpu

3. $ nvclock -T
However, I haven't found any widget or plasma app to show any these number as a graph over time. It would be nice to have one of these next to the CPU temp monitor.

Anyone aware of such an app? Even if I use KDE there may perhaps be a Gnome one which works.