So its not as powerful as a 7990?
If BF4 was showed in 4K then that is 8 251 200 pixels.
BF4 here in res 5760*1080 is only 6 220 800 pixels.
That is about 75 procent of 4K.
EDIT: Just for clarification my winter is going to have alot of nuddles in it.
It was 3K, so 18% less.
Also note that 7990 is about 20-25% faster than Titan (if you trust ixbt labs, which I do).