F5F Stay Refreshed Hardware Desktop PCI-e 4.0 and 3.0 interchange "transformation"

PCI-e 4.0 and 3.0 interchange "transformation"

PCI-e 4.0 and 3.0 interchange "transformation"

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Master__Panda
Junior Member
30
06-06-2019, 08:09 AM
#1
I just have the most peculiar question which it that, Can't technically 1x bandwidth of PCI-e 4.0 be converted into 2x PCI-e 3.0 ? Meaning if CPU has 20x PCI-e 4.0 lanes, can't it be that 16x PCI-e 4.0 would be used for GPU and the rest of bandwidth be converted into 8x PCI-e 3.0 on other slots? Thanks for every response, A.
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Master__Panda
06-06-2019, 08:09 AM #1

I just have the most peculiar question which it that, Can't technically 1x bandwidth of PCI-e 4.0 be converted into 2x PCI-e 3.0 ? Meaning if CPU has 20x PCI-e 4.0 lanes, can't it be that 16x PCI-e 4.0 would be used for GPU and the rest of bandwidth be converted into 8x PCI-e 3.0 on other slots? Thanks for every response, A.

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aikorner
Junior Member
43
06-08-2019, 02:56 AM
#2
It should be feasible with extra hardware, but your motherboard won't handle it automatically. For instance, a PCI-e 3.0 x16 card in a PCI-e 4.0 x8 slot will operate at PCI-e 3.0 x8 speed, requiring an adapter (like an NVME SSD extension) that includes its own controller to manage bandwidth. I'm not sure if such options exist for graphics cards.
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aikorner
06-08-2019, 02:56 AM #2

It should be feasible with extra hardware, but your motherboard won't handle it automatically. For instance, a PCI-e 3.0 x16 card in a PCI-e 4.0 x8 slot will operate at PCI-e 3.0 x8 speed, requiring an adapter (like an NVME SSD extension) that includes its own controller to manage bandwidth. I'm not sure if such options exist for graphics cards.

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DropletJ
Junior Member
44
06-08-2019, 04:36 AM
#3
In theory, yes. I haven't come across any consumer PCIe 4 devices or motherboards that offer this feature, and I'm uncertain if it will ever gain widespread use. The Liqid Honeybadger handles it by utilizing 16 Gen 4 lanes for 8x4 PCIe Gen 3 drives (32 lanes).
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DropletJ
06-08-2019, 04:36 AM #3

In theory, yes. I haven't come across any consumer PCIe 4 devices or motherboards that offer this feature, and I'm uncertain if it will ever gain widespread use. The Liqid Honeybadger handles it by utilizing 16 Gen 4 lanes for 8x4 PCIe Gen 3 drives (32 lanes).

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Cat_Girl03
Junior Member
20
06-30-2019, 02:39 AM
#4
It mainly manages the link between the CPU and other components, directing data much like a busy intersection handles vehicles. The setup isn't always ideal for your needs.
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Cat_Girl03
06-30-2019, 02:39 AM #4

It mainly manages the link between the CPU and other components, directing data much like a busy intersection handles vehicles. The setup isn't always ideal for your needs.