My pc is acting strangely, PSU to blame?

[Soso]

Hello everyone,
my new PC that I built three weeks ago has been acting strangely recently. This is going to be a long one, so please read everything.

I really need your help because I spent 400€ on this pc and I can't even use it anymore.
When I started using it, I realised that my GPU usage in Overwatch would dip to 0 momentarily. It also froze frequently not in game, but idle, watching videos or changing my windows background.
I stumbled upon the windows reliability setting, and saw that multiple times had the hardware was causing these issues.  I had a live kernel event with the code being 144 , despite haveing the most up-to-date drivers.
I have also discovered something wierd with my PSU: a coil has bent and touching a yellow plastic block in the PSU. Is this normal? 
Finally, the pc has become unusable: it froze twice in a row while watching YouTube, resulting in me having to use the reset button more than I would like.

I then reset the cmos, which worked for one hour, but one system restart later and It would still freeze.
My specs: Bequiet system power 9 500w
Ryzen 3 1200 stock speed
MSI GTX 770 stock speed
4gb ddr4

All connectors are properly inserted.
I would appreciate any help because this is really stressing me out.

 

[whoisjaya]

Did you check your components' temperatures under load?

[Soso]

9 minutes ago, Jonas_2909 said:

Did you check your components' temperatures under load?

The GPU hits 60 c in Overwatch, but I'm not sure about the CPU.

[Spotty]

5 hours ago, Soso said:

When I started using it, I realised that my GPU usage in Overwatch would dip to 0 momentarily. It also froze frequently not in game, but idle, watching videos or changing my windows background.

 

5 hours ago, Soso said:

4gb ddr4

There's your problem. You have insufficient memory. The computer is often freezing because it's out of memory and relying on your storage drive to act as ram which is much, much slower.

[Soso]

22 hours ago, Spotty said:

 

There's your problem. You have insufficient memory. The computer is often freezing because it's out of memory and relying on your storage drive to act as ram which is much, much slower.

 

 

But my PC was working fine 2 weeks ago, so i find it wierd for it to stop working suddenly.