r7 260x bad fps

Konan tato

Honorable
Dec 13, 2013
43
0
10,530
hello guys im having problem while playing bf3 and bf4 my problem is that when i play bf3 the fps at the beginning is solid 60 but after 5-10 second the fps drops to 40,50,45 i dont know why
my pc spec is:
fx 8320 3.5
gigabyte r7 260x 1gb
ram 4gb
hdd 260gb
motherboard:asrock 970 extreme3 r2.0
and my cpu heat is normal 35-40
and everything is working okey
 
my res is 1360*768 i played bf4 with mantle its the same its start with 60 solid at medium after 5sec or less its drops to 45 btw even on res 1280*768 its keep dropping and my gpu usage is not stable its keep changing to 30% % 7% 90 and etc