ir probably has less to do with the system processor and more to do with the burn quality (ie the burner, firmware, media, burn speed, etc, etc)
if you don't know the above variables for each system that you've burned discs on then it's going to be very difficult to troubleshoot your problem...
as a general rule you want a good burner (you never said what kind you had) with up to date firmware (also not specified) using quality media (not specified) and burning at the rated speed of that media.
you also want to try not to multitask during burning as that can cause poor quality burns that may not be readable on some playback devices.
sone players/drives are pickier than others so if you're using DVD+R media, it's a good idea to bitset or booktype them to DVD-ROM (if your burner allows...not all do)