Random freezes and buzzing sounds??

[DLock]

Thats weird i just chiped mine, and use the new bios 4979.67 and burned my first 2 games and Crazy taxi played fine, the second one was NBA Live 2004 and it does the samething u said it will play 10 to 20 minutes and freeze up and make that buzzing noise. So i know it is not a heating problem cause i can play Crazy taxi as long as i want. So i have no clue what the problem and im not using any evox.

Oh the chip is excuter 2.2 lite+