gtx650 ti or ati radeon hd 6770

Solution


If you already have the 6770 it's not worth getting the 650, or probably even the ti boost. Save a little more money and do a significant enough upgrade to really make a difference in the game, like the GTX 760 or HD 7870LE.
The GTX 650 is the superior card, but I would get the 650ti Boost for just a few bucks more. Pretty significant performance increase for the small amount of extra money.

For Crysis 3 and BF4, don't expect stellar performance. Crysis 3 is one of the roughest games out there right now, and BF4 will likely be similar. It's not that the GPU is poor quality, it's just that it's a sub-$200 GPU on incredibly rough games.
 
Actually the normal GTX 650 is slower than the HD 6770.
The 650 Ti however is faster.
The GTX 650 Ti Boost is even faster, but so is the HD 7850.

If you want to play Battlefield 4, the GTX 650 Ti will be the bare minimum.
 
the gtx650ti will be a tad bit faster.
I recommend you getting the boost edition though... its just a small difference in price for a big boost in performance.
for the AMD equivalent, i recommend the 7790 if you're tight on budget or the 7850 if you have the spare money.
 


If you already have the 6770 it's not worth getting the 650, or probably even the ti boost. Save a little more money and do a significant enough upgrade to really make a difference in the game, like the GTX 760 or HD 7870LE.
 
Solution


what about GTX 660 for Battlefield 4?