
Originally Posted by
Tankbuster
There could be, but the reason we say this is that we do often get users giving the exact same symptoms you describe and they are invariably overheating. It's a very common question here.
That said, you do sound like you know what you're doing, so let's try a little troubleshooting.
These artifacts - are they black or grey triangular objects that obscure much of the screen and appear to all originate in the same place?
Are you running any mods? I found gachopins lovely MH53 would make some crazy graphics glitches.