Version of ps2 and bootchip

[moose2k22]

Hi

I just bought a ps2 a week ago. I want to install a bootchip but cant find out which version my ps2 is. I've been surfing a lot of webpages and cant seem to find anyone that describes my ps2.
The Model-no is SCPH-30004 R
The serial starts with C46 and ends with 017 if thats of any use. Anybody who can tell me which version I got (I suspect it to be v5 as the ps2 is brand new)

And what bootchip should i choose?
I've read something about using action replay for booting up the backups. Is this with the bootchip or must I buy it seperate?

Thanks in advance