I just built a new gaming rig, and installed directx 11. I bought an old game that required directx 9, wouldn't run on 11. I installed directx 9 and it worked. Does this mean my computer is now using 9 all the time, or are both 11 and 9 functioning? I don't want to sacrifice performance on newer games because I'm using 9 only. I don't really know what directx is