real fps drops to half

yamasow

Reputable
Mar 30, 2014
3
0
4,510
all fps of games using DirectX or OpenGL drops to half,but fps counter(fraps,Dxtory,Afterburner or built-in)shows doubled fps. (e.g. when fps counter shows 60fps,real fps is 30 or so)
thus,I have to play games limited to 30fps with 15fps!this could be a problem.
What I Tried:
reboot
reinstall game
reinstall graphic driver
reinstall OS
change Graphics Card(GTX460 to GTX560ti,GTX560ti to GTX760ti)
these all was not worked.

Sorry for my poor English,English is not my native launguage.
 

yamasow

Reputable
Mar 30, 2014
3
0
4,510


CPU:intel i7 870
Mainboard: H55-G43
HDD: HDS721010CLA332 1TB
Power supply: KRPW-SS600W/85+/A (japanese brand)
RAM: 12GB (DDR3 4GBx2 + DDR3 2GBx2)

I also tried removing 2GB RAM, was not worked.
 

yamasow

Reputable
Mar 30, 2014
3
0
4,510


N460GTX-M2D768D5

N560GTX-TI Twin Frozr II OC 1GB

ZOTAC ZT-70405-10P (GTX760)

Having half framerate problem in these 3 GPUs.