gussrtk :
The 730 is really not a "gaming" gpu let's say. I also know that some of those cards don't even come with a heatsink fan. Do you have a fan on it?
Which games do you play? Because the games could be just too much for gpu and it just can't keep up. Also you said it's got weird graphic issues? Could even be the gpu is just dying.
If it is, an RX 460 is a great low budget gpu for a great price, that's a suggestion as well.
It does have a fan on it. The games that are currently giving me problems are Eurotruck Simulator 2(weird graphics), Far Cry 4(won't start), Crysis 2(weird graphics) and Mafia 2(occasional weird graphics).
I don't think it's dying, it's been bought last week.
PS: The temperature rarely goes over 60ºC but I managed to lower it by about 10ºC with some Silver Arctic paste.