PCIE x1 card in PCIE x16 slot?

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Damn_Rookie

Not true. You can actually use a PCIe x1 (or x4 or x8) card in a x16 slot. While not applicable in this particular case (what with the mini-ITX board and all that), just keep in mind that if you're currently using any other x16 slots, plugging a x1 device into a second x16 slot will take some of its PCIe lanes away.

From the Wiki page: "The lane count is automatically negotiated during device initialization, and can be restricted by either endpoint. For example, a single-lane PCIe (×1) card can be inserted into a multi-lane...
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Damn_Rookie

Damn_Rookie

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Feb 21, 2014
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Not true. You can actually use a PCIe x1 (or x4 or x8) card in a x16 slot. While not applicable in this particular case (what with the mini-ITX board and all that), just keep in mind that if you're currently using any other x16 slots, plugging a x1 device into a second x16 slot will take some of its PCIe lanes away.

From the Wiki page: "The lane count is automatically negotiated during device initialization, and can be restricted by either endpoint. For example, a single-lane PCIe (×1) card can be inserted into a multi-lane slot (×4, ×8, etc.), and the initialization cycle auto-negotiates the highest mutually supported lane count."
 
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Pcbro980

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May 8, 2016
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Does this mean any 1x, 4x and 8x card can fit into an 16x slot? I am looking at a dual cpu setup for video rendering and the motherboard i want has 7 16x slots only and i was worried that i wouldn't be able to use my WiFi card or my other 8x card.
 
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