i5 4670k turbo boost question

~4.3ghz H55 cooler watching a video in 720 on another screen hence the "high" temp

I wonder why some video cards would have such problems in infantry fighting in Bf4. My 770 might only drop 3 fps in infantry fighting. If there's explosions and infantry it doesn't really drop more than 10 fps... I don't get why a 760 or 7950 would drop lots of frames then when my 770 only drops around 3... I play at ultra and get right at about 60 fps and it doesn't ever really drop below 50 in the worst most hectic scenarios in Bf4...

The GTX770 is a considerably more capable GPU than a 760 and 7950. Just to add an interesting note; when I overclocked my 7950 it almost always stayed above 50fps even when the action got heavy and the rest of the time it stayed pegged at 60 with V-sync enabled. Surprising that with just a modest OC my 7950 can nearly match a GTX770 (in this particular game anyways).