Hello Everyone!
I bought a new PC this week which included the HD 7870 XT Joker card.
Its a lovely card however I do have some weird problems and I cannot find someone else who has this problem..
When im just surfing the internet etc my pc has an idle temp of 25 degrees. Screenshot below

But when I go afk for more than 30 seconds it start to get really hot and I get some ( artifacts? ) on my screen.

The artifacts?

Can anyone help me?