Which chips can be installed in a PS2v9

[legion1234]

Alright guys i'm a bit confused.I talked with the guy that was going to install the chip on my PS2 and found out that chip is a friggin Magic 3.5.Fortunately i was short on money so i didn't get my PS2 modded.

I thought the Magic 3.5 didn't work in a PS2 50001!?but he told me that he has installed 4 chips already in another clients PS2 50001 and that they worked fine.

I talked with another installer in my area and he offered a chip called Max 2 or something he say that the chip reads every thing.Have you heard anything about this chip?