Original Wii and GCN optical drive speed?

[TL7dolphin]

Typical DVD disc speeds:

• Laptop drive: ×8 constant angular velocity.
• Desktop drive: ×16 constant angular velocity. (×12 on Dual Layer due to DVD lens maximum reading speed).
  

What is the original speed of the [color=#3333ff]Wii [color=#333333]and [/color][color=#ff3366]GCN [/color][/color]DVD drive?