3 Things to Know About RAM for the PowerBook G3 Wall Street

Use 3.3V PC66 or PC100 SO-DIMMs The Wall Street requires 144-pin, unbuffered, non-ECC SO-DIMMs. Stick to these specs for reliable operation.

Mixing speeds works but slows the system You can combine PC66 and PC100 modules if you are scavenging parts. The system will run at the speed of the slower module.

Vintage compatibility is forgiving The Wall Street is more tolerant of mixed RAM than later models. This makes it easier to upgrade from spare parts.