You will also need some software and anywhere between two a billion CDRs a 6pin-6pin power booster cable (Go Apple!) Google.Snow Leopard 10.6.4 with Graphics Update OR 10.6.5 OR 10.6.6.So, let’s start with a list of what you do and don’t need. OK, there is a lot of bad advice out there on flashing PC video card ROMs to work with Snow Leopard 10.6.4.