Determine if graphic card is HDMI CEC capable
Solution 1:
I would bet good money the card is not CEC capable. Very little PC equipment is.
Assuming your television is capable (and Sony used to limit theirs to Sony equipment only!), you'd want an HDMI-CEC to USB bridge. Like this: http://rainshadowtech.com/HdmiCecUsb.html
Again: Sony equipment (last I knew) only communicated to other Sony equipment via CEC.