BigCacahuete :
dotas1 :
Make and model of your PSU? Please don't answer like antec 400w. Open case and see exact make and model.
ACENS MP600 600W GAMING 14DB PFC
So, your power supply is rumoured by the website to push out a 99% efficiency rating from its power supply, and if that's true, 600W for this system would basically be overkill. If you still have warranty on your card, I would go through an RMA process, but I would try these steps first.
1. Try downloading the most recent drivers for your card. If the problem has persisted since you downloaded these drivers, please download some older drivers to see either of those help the situation.
2. Check if there are any vital updates that are needed in windows, and try updating those if applicable.
3. See if all connections from the motherboard to graphics card are secure and stable.
4. If any of these did not work, please try to find another PC to test the graphics card upon. Please send us what kind of results you get from using the card in a different computer.
If these steps don't work, I would highly recommend going through Gigabyte's RMA process and getting a new card before anything else happens. Good luck!