Yes.
The HAF supports up to 175mm high CPU coolers.The Dark Rock 3 is 160mm high.
The HAF supports 270mm long GPUs with the first HDD cage and 390mm long GPUs without the first HDD cage.The EVGA GTX 770 is 26.67/10.5" long.You are good to go in both situations.
All the best.
Yes.
The HAF supports up to 175mm high CPU coolers.The Dark Rock 3 is 160mm high.
The HAF supports 270mm long GPUs with the first HDD cage and 390mm long GPUs without the first HDD cage.The EVGA GTX 770 is 26.67/10.5" long.You are good to go in both situations.
All the best.