Thanks and i just wanted to ask if it be able to play the new games like Bf4 on ultra?
i have a gtx 770 4gb and bf4 don't use more that 2gb gddr5 ram, on the overclock settings i can get 80-85fps.
personally i have it on v-sinc just to make it sit a little stabler on fps (monitor cant refresh any more than 60 times anyway) and it hardly ever drops below 60fps, maybe once or twice in a large 64 player deathmatch say if a huge bomb goes off next to you, maybe to 57-58fps. and on the odd game in normal sized matches.
but i do agree with the above, clock speed isn't everything. its whats inside that counts such as the shader cores/ transistors as mentioned above. giving more clock speed will give more speed over stock but not by a mile.
your 770 will be fine for bf4, if you wanted the best of the best, get the gtx 780 or titan, or the r9 290x
the 780 or r9 290x however would give you a better gaming experience, but i doubt by 40%. the gpu benchmarks give on bf3:
gtx 770, 81fps oc edition with similar specs to yours, 76fps on stock 2gb edition.
gtx 780 3gb, 94fps
r9 290x 3gb, 94fps
gtx 780 ti, 111fps
so as you can see, not a 40% increase and personally not worth the extra money. its more of a 15-20% increase.
gtx 770 is £275 gtx 780 is £420.
if you need more power in the future upgrade, maybe even add another card in sli.