wrong cd`s?
 

I had a version 4 with a non-solder chip which after a swap trick would boot 74min toc games but not 80min,
so i got my self a version 5 and had a messiah2 chip installed,
this seemed fine on 80min toc but most of the games which worked fine on the version 4 dont work:(
i wondering if its the media im using...i use TDK dview.

Where these games rips or direct copies? Were they patched in any way? Your TDK media is fine.