Which country are do you live in? What's the manufacturer of your graphics card?
If that doesn't work, you could try and buy a new graphics card and plug that into your computer to see if it works fine. If it does, then your current graphics card probably died (which sounds strange since you've only had it for 2 months)
Other than the card is dead or the drivers are messed up, I can't think of any other probable issue except your power supply is not supplying enough power to the card (but your system should just shut down if that is the case).
Is the card properly seated into the pci-e slot?