Graphics Card Underperforming??

[Shantanu Ghose]

hello all,,,these are my specs:
asus p8b75
i3-3210
gskill ripjaws 4gb ddr3
seasonic 520w psu
acer X193HQ monitor(VGA)
creative speakers 2.1
sapphire hd 7770 ghz edition

i play games on 1366x768,i ran FRAPS while playing AC4 Black Flag with high settings(FXAA and SSAO) and my fps averages at 30-45,,sometimes even to 20,,is this okay or is my system is bottlenecking the GPU?? Tomb raider also lags on ultra settings,,runs best on medium/high

this is the snapshot of systemrequirementslab scanning for bf3,,,shouldn't it be better??

and on the same site,crysis 3 qualifies the recommended requirements,,but when i run it,the game lags on high settings and i haven't even tried the very high settings plz help me

any article i read,it says there that these games should run at ultra i 720p,,is my system a bottleneck or my card is faulty?

 

[getochkn]

The 7770 is a very basic card. I had the 7750 and it was meh, ok.

 

[Shantanu Ghose]

but i play at 1366x768,,,now wherever i see in the internet,,the guys always say that resolution is heavne for games and bla bla bla http://www.tomshardware.com/answers/id-1660999/crysis-low-fps-gtx-650.html,,,visit that for example