Ive had to go back to Afterburners RTSS, as the Performance Metrics Overlay just ***** up all the time, i changed it to CTRL+P, fired up Prey, and everytime i try to bring it up, he was just bringing up his communicator thing (as 'P's assigned to that, the CTRL key seemed not to be registering), and the game was plummeting to around 57fps, and tearing like a ****, quit back to desktop, re-fired it back up, and it was still the same, without even trying to bring on the Overlay, around 57fps, and tearing like an absolute ****.
Had to quit and reboot to sort, then thought, when i whack the game on, i'll go through the controls, see what keys i havn't got assinged, and ill use those for the Overlay, so did that, and now works fine, so it looks like, everytime i put a game on, im going to have to go through the controls of it, to see what keys i havn't got assigned for anything, so i can change the Performance Metrics Overlay to em.
Hopefully, we can have an any single key assignment for it, like RTSS, as i have that set to a single key on my numpad.