OP:
yeah it will suffice @ 1080p (if that is what you have and assuming you have ample cpu, psu and ram... etc, but it just may not be enough to max out 100% of games at 1080p, it depends on the game, however in most games (valve, and console ports) you will be absolutely fine at 1080p and high settings... heck in many games you will be fine, look up some benchmarks on google... in games that are choppy, drop it to medium settings in game or decrease the res to 16X10 and decrease aa and af settings for better framerates...
If you want more performance the next thing to do is start overclocking your gpu and cpu which is also easily attainable but can have a bit of a learning curve if you are not familiar, either way their is plenty of information on the net