all games lag when in an open area in-game

andrew1995

Honorable
Oct 8, 2013
3
0
10,510
hello,
i bought a hp laptop 1 month back , and whenever i am in a OPEN/HUGE AREA IN GAME THE FPS DROPS FROM 35-40 TO EXACTLY 17-19 IN EVERY GAME , GAMES I PLAY FAR CRY 3, CRYSIS 3,TOMB RAIDER, I'VE TRIED CHANGING VIDEO SETTINGS AND THE SYSTEM ISN'T OVERHEATING AS IT GOES CPU-85 DEGREES AND GPU-75 DEGREES MAX , THE ONLY GAME THAT HAS RUN SMOOTH IS ALAN WAKE'S AMERICAN NIGHTMARE WHICH I WAS ABLE TO PLAY ON MAXED OUT AT 30-40 FPS WITH NO LAG/STUTTER.PLEASE PROVIDE SOME INFORMATION ON THE PROBLEM AS I AM CLUELESS.
MY SPECS.-
AMD A8 4500M QUAD CORE
4 GB DDR3
RADEON HD 7670M
WINDOWS 7 ULTIMATE 64BIT