if its not the cds then what is it

(
i'm desperate, all burned games freeze after an hour or so of gameplay, my only guess is that the dc overheats and thats y it freezes, i dont think its my cdr thats messin the games cause they're playin for 1 hour or more perfectly (sometimes though) and i dont think its the media cause i've tried several, i also dont think its the dc cause original games work perfectly. so plz guys tell me what to do