I just got a bargain on an r9 280x sapphire vapor-x. The seller told me it doesn't boot unless you heat it up with something like a blowdryer. And...it does, boots up nothing weird happening. But on a cold boot it doesn't give a picture, nothing. When it's up and running it plays games perfectly no artifacts or high temps or anything else out of the ordinary. Can anyone tell me whats up with that and preferably how to fix it?