Fps Drop and Performance Issues

[André Campana]

Since the 1.3 Patch, while i'm playing normally everytime occurs a serious fps drop, i disable v-sync and the game only runs at 60 frames, i've edited the main_settings.cfg modifying the updates per second value and stills the same, the game only runs at 60 frames, then when i look somewhere on the map the fps drops to 30 frames, if i don't look at it, it goes and locks to 60 again, this only happens when i play the game on High settings, on Medium this doesn't happen. I May be wondering, maybe particles system loading behind walls? or that's the power management of my computer?

System Specs:

Core I3-530 2.93GHz (OC 3.6GHz)
6Gb of RAM DDR3 1333MHz (3x2Gb)
ECS H55H-CM
Samsung HD502HI 500Gb Sata 2 5400 Rpm 3.5"
Zogis GT440 1Gb DDR3 128-Bit PCI-E 2.0

All drivers up-to-date