Is my GPU dead?

[Majazzleren]

So my desktop started looking like this?

sometimes when i join a game, it just disconnects the screen and reboots

When it boots again it pixels the screen.

 

but its works? i mean i can play and everything.. some wierd pixels. 

[Crunchy Dragon]

Your GPU isn't dead, it's mostly dead.

 

Your VRAM is likely going out. If the GPU was entirely dead, then you wouldn't be able to boot with it installed in the first place.

[Bananasplit_00]

display drive circut has started to die, might disapear if you use another display output

[waterjug]

yeah it's probably a GPU related issue. try another display output like @Bananasplit_00 said. (e.g. hdmi instead of vga or something like that)