PS3/Wii/360 Tie Ratios ("attach rates") from NPD

[sinha]

From NeoGAF (NPD through November):

PS3 4.01
Wii 3.86 (not including Wii Sports)
360 6.85

Overall hardware units were up 26% y/y counting current and next gen consoles and handheld sales. The PS3 was up 285% sequentially and 137% y/y and the tie ratio improved to 4.01 from last month's 3.82. The Wii increased 89% sequentially and 106% y/y, with a tie ratio of 3.86, not including the Wii Sports title bundled with the system. The Xbox 360 was up 51% y/y and up 110% sequentially, while maintaining a strong life-to-date tie ratio of 6.85. NDS sales rose 67% y/y, while PSP increased 38%.

...

I can tell you that PS2 is well over 13, Xbox well over 10, and Gamecube well over 8.

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Some previous info:

Joystiq (NPD through September):

• Xbox 360: hardware to software ratio: 6.59 (hardware total sold = 6.8 million; software total sold = 44.8 million)
• PlayStation 3: hardware to software ratio: 3.58 (hardware total sold = 1.9 million; software total sold = 6.8 million)
• Wii: hardware to software ratio: 3.44 (hardware total sold = 4.5 million; software total sold = 15.5 million)

Removing [Wii Play] data from these ratios leaves the Wii hovering around 3 games sold per system.

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July 07 Microsoft PR (NPD through June):

"Xbox 360 is the next-gen console with the largest games attach rate at an astounding 5.9 games sold per Xbox 360 owner."

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Software based on hardware sales and tie ratios:

360: ~54 million

Wii: ~23.2 million

PS3: ~9.75 million