How do i know my chip and BIOS ?

[A....toreador]

Well there is a guy that knows a guy that puts modchips.I asked him what mod do i have and he told me that he puts the latest and blablabla.(he didnt want to answer.I have it 8 months now)

Is there a way to learn what chip do i have and what bios ?
I have installed EvoX and in the bios area it says ''uknown''.And i worry.

Why i worry ? Because i heard that many games need one of the newest bios.I backed up some games(Rayman 3,The sims,BloodRayne) but i have problems with some.Dead or alive 3,The two Towers,while fifa 2003 can be played only from my HD.(In DVD it freezes after the xbox logo.)
I also hear that the latest games need patching.Well in isocraxtion when i hit the patch option it says (to all except Rayman i think) that they dont have to be patched.While the same option in Xiso v.115 it says ''patched corectly''.I also read that there arent separate patches for games (like computers program cracks)

Anyway i am confused.The essence is to play these games and i think that the problem is the bios.
Can someone help ??