thank you for the reply.
Every thing is up-to-date.
this happens in nearly Every game i play. (Cities Skyline, BF4, FC4, KSP)
im playing at 1650 x 1200 Res. memory usage doesnt rice above 7.5-7.6GB.
althou there is one strange thing i noticed in the GPU-Z that there is a GPU Power Limiter...