PCIe 3.0 x 1 (at x4 mode)?! - 3C

剛剛在看華碩主機板 ROG STRIX Z270G GAMING
https://www.asus.com/Motherboards/ROG-STRIX-Z270G-GAMING/overview/

看到下面的說明:
2 x PCIe 3.0 x 16 (support x16, x8/x8)
2 x PCIe 3.0 x 1 (at x4 mode)

他的意思是說PCIe x1可以有x4的頻寬嗎?
通道數不是只有1/4嗎?

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