instal pcie x16 card in pcie x4 slot

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Ahmad_44

Commendable
Apr 15, 2016
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1,510
I have ab350pro4 motherboard with ryzen 5 processor. I got an accident and the lane in pcie x16 which I usually put my gpu broken. can I put my card in x4 slot instead? much appreciated for your helps.
I read in the manual regarding pcie expansion slot and it stated like this

"PCIe slots:
PCIE1 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE2 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.*
PCIE3 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.**
PCIE5 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE6 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
* PCIE2 will downgrade to x8 mode when A-Series APU is installed.
** PCIE4 will downgrade to x2 mode when A-Series APU is installed.
** If M2_1 is occupied, PCIE4 will be disabled.
 
Solution
herrwizo
Depends primarily on which GPU do you actually have. Reducing bandwidth to PCI-e 3.0 x4 for, say, Radeon RX480 would not do much (tested this in practice myself just for fun, basically no difference!). But it would certainly limit 2080Ti :D It would still work, though.

Note that you cannot use this slot at all if you have M2_1 slot occupied!

So, in summary: you can use it if you odn't have top-of-the-line GPU, and it would even run at same perceivable speed most of the time, if not all the time.

Long-term, you should still replace the motherboard.
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herrwizo

herrwizo

Illustrious
Feb 17, 2009
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Depends primarily on which GPU do you actually have. Reducing bandwidth to PCI-e 3.0 x4 for, say, Radeon RX480 would not do much (tested this in practice myself just for fun, basically no difference!). But it would certainly limit 2080Ti :D It would still work, though.

Note that you cannot use this slot at all if you have M2_1 slot occupied!

So, in summary: you can use it if you odn't have top-of-the-line GPU, and it would even run at same perceivable speed most of the time, if not all the time.

Long-term, you should still replace the motherboard.
 
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