Guild Wars 2

i use a vsync 60 hz and 60 fps limiter …
if i have google chrome open in background my fps is 60 -61
if i close google chrome my fps goes to 50 -51

this is so strange , anyone have the same problem ?

I had something similar happen in another mmo, without media player open it would stutter, with it open it would run smooth, it turned out media player was accessing higher windows functions than the game (which helped the game run smoothly)..

You could be seeing a similar occurrence.