I feel like my current 780 is Not living up to its name. I get tons of stuttering in some of my games and I know its not lag. I have 8 GB at 2400 MHz for ram and an i5-4670k for CPU. I also have a Corsair TX650 80+ power supply. Like I said I feel like its not getting the performance it should. I'm thinking of getting some MSI AMD cards to go along with MSI motherboard. Plus i'd like to get into litecoin/bitcoin mining. What cards do you reccomend that stay under $650. I plan on getting two 270x's. Will I get good performance? I mainly play assassin's creed 4 and battlefield 4. Thanks!