What type of chip is this

[asriel]

hi,

i had my ps2 chipped with one of the magic's (not sure which one), but since it was installed i have had nothing but trouble. I have been back to see the guy who installed it and he says he will replace it with his new chips when he gets them.

The thing is he says the new chips are called Judas, i have not heard of these before. Are they a clone of something, can someone please tell me if they are ok to use or am i better of telling him i need something else.

Thanks for your advice.