You may need to install RTSS, riva tuner statistic server, this allows the osd to be displayed in apps etc…
IMPORTANT EDIT. RTSS CAN CAUSE YOUR APP TO CRASH WHEN USING AN OSD. NOT OFTEN DOES IT CRASH BUT IT CAN
THIS IS MY DEBUGGING INFO
read below
Dumpfile
I discovers the RTSSHooks64.dll caused the crash with nvidia drivers