Answer
This model comes with 3 PCI Express slots. Only the first PCI Express slot (the closed to CPU) supports PCI Express Gen2.0 x16 bandwidth, the second PCI Express slot supports PCI Express Gen2.0 x8 bandwidth, the third PCI Express slot supports PCI Express Gen2.0 x4 bandwidth.
![](/ECSWebSite/images/pin/a890gxm-a pci-e.jpg)
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