F5F Stay Refreshed Hardware Desktop Switching from PCIe Gen 5 x4 to Gen 3 x16

Switching from PCIe Gen 5 x4 to Gen 3 x16

Switching from PCIe Gen 5 x4 to Gen 3 x16

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_Mishie_
Member
202
06-26-2022, 09:59 AM
#1
Considering an older X99 board with two x16 ports, you want to use the second port for an M.2 Gen 5 x4 NVMe drive and make full use of its 16 lanes via an adapter. This is feasible if the adapter supports the required bandwidth and protocol.
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_Mishie_
06-26-2022, 09:59 AM #1

Considering an older X99 board with two x16 ports, you want to use the second port for an M.2 Gen 5 x4 NVMe drive and make full use of its 16 lanes via an adapter. This is feasible if the adapter supports the required bandwidth and protocol.

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Fordtuff18
Member
141
06-26-2022, 11:42 AM
#2
I haven't encountered anything similar before, which makes me very skeptical.
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Fordtuff18
06-26-2022, 11:42 AM #2

I haven't encountered anything similar before, which makes me very skeptical.

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DGY_DinoGamez
Member
191
07-01-2022, 10:58 AM
#3
PCI-e5.0 x4 operates on PCI-e3.0 x4 within a PCI-e3.0 port. No method exists to convert four lanes of PCI-e5.0 into sixteen lanes of PCI-e3.0.
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DGY_DinoGamez
07-01-2022, 10:58 AM #3

PCI-e5.0 x4 operates on PCI-e3.0 x4 within a PCI-e3.0 port. No method exists to convert four lanes of PCI-e5.0 into sixteen lanes of PCI-e3.0.

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Llabros
Senior Member
740
07-01-2022, 08:17 PM
#4
PCI lanes provide a straight connection from the CPU to the hardware. When a device can handle four lanes, it operates with four lanes even if the PCI version is different. This means a Gen 5 chip running on a Gen 3 system will still function properly.
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Llabros
07-01-2022, 08:17 PM #4

PCI lanes provide a straight connection from the CPU to the hardware. When a device can handle four lanes, it operates with four lanes even if the PCI version is different. This means a Gen 5 chip running on a Gen 3 system will still function properly.