Sounds like something somewhere loses contact until it's warmed up. Could be a faulty piece of solder. Since it's new, if you can, see if you can just return the card for another. If that doesn't work, it's the motherboard. I know it can be a pain in the ass, especially if you're an impatient individual such as myself, but that would be your best course of action.
yeah probably something is faulty, i'll try to contact the seller and see if i can return this.
i'll update again later on.
btw thanks for the reply jdog2pt0