PSU, or me Being too worried

Steel2

Commendable
May 24, 2016
2
0
1,510
The situation: I get electric shocks from the chassis of my just-assembled PC even when it is not turned on. My PC was ungrounded. My totally new PSU is the super flower leadex gold 750W. This problem seems to completely disappear when I ground it.

Also, with this new build my monitor is making a small fan-like sound when turned on(ungrounded). If it is relevant , i do not have a GPU Installer yet.

Question: should I be worried? If yes: how should I investigate this \ proceed?
 

Steel2

Commendable
May 24, 2016
2
0
1,510
@petrossa cables seems fine when i plugin a coffee Machine.
@Ninja its on rubber feet on concrete floor.Not in the sun, the problem appeared last midnight as well.