N64 shipments are harder to gauge because it had a staggered launch in different territories. It launched in Japan in June 1996, but didn't launch in Europe until March 1997 for example.
From Aquamarine on Neogaf:
The N64 shipped 5.80 million total in:
1) 6 months for the USA
2) 9 months for Japan
3) 30 days for Europe
For its time, the N64 was actually I think the fastest selling game console. It was a monster out of the gates, but it faded because of the stupid cartridge only decision that choked the system away from having any third party support aside from like Acclaim.







