MSI 970A-G43 AM3+ AMD 970 + SB950 crossfire bandwidth question

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Newegg mentions the motherboard below:

2 x PCI Express 2.0 x16 slots
- PCI_E2 supports up to PCIe x16 speed
- PCI_E4 supports up to PCIe x4 speed

Does this mean the motherboard is 16x/16x when in crossfire? I'm a bit confused due to often seeing many different expressions. (16x, 8x) or (16x/4x)

Here is the link:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130679