The cable or the connector went bad, try another HDMI cable and see if it persists.
Usually when there is bad contact, this "pixalitzation" can be some red dots or something like that
It should be fine, total system consumption should not be over 400w at most with a RX580, and the PSU is good.
CPU+fans+SSD or HDD+ USB devices... it will be under 150w, and the RX580 less than 200w
First try to acces the bios and make sure that the primary display is on gpu graphics
bios image
if it does not work:
If you have acces to another pc you should try the gpu there. If the other pc has a cheap or not powerful PSU is ok, it will only draw a bit of power. Let it only post and see...
I'ts likely that the bearing on the fan went bad.
I have a 3080 with a fan that wiggles arround sometimes so before the waranty expires, i will make a RMA that i alredy confirmed i can do by the e-comerce i bought it from.
The e-comerce allows me to get back the money i paid for the 3080, so i...
It is actually fine, but if the noise is to great, you maybe can do a RMA and get one that doesn't sound as bad, but probably you will get the same problem
You can try a BIOS update: https://www.asrock.com/mb/Intel/B660%20Pro%20RS/index.asp#BIOS
If you put it on the second PCI slot does something different?
It sounds like a software problem more than hardware related. I think that on a fresh windows install it should work fine.
When it crashes you can see why on the windows event viewer
Make sure you connected it correctly to the MoBo.
Also check that on the bios, you ahve the ACHI mode instead of SATA mode on. The setting is called something like PCH storage config i think
If you want to be sure if it has bad vRAM chips you can use a tool, but you will have to burn a program (MATS) to a usb device and boot from that..
Anyways, if you want to try there is it https://drive.google.com/file/d/14C_lsnsJd4H5VVKugAN5jobKGmPUtqz-/view
You can use this yt video for...
There is a graphic option on some games called film grain or something like that, and it does like this thing that is happening to you. Did you check that?