Question PCI-E 4.0 x8 GPU on PCI-E 3.0 x16 MOBO. Will it bottleneck?

Jun 13, 2022
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Will Radeon 6600 (non-XT) which is on PCIe 4.0 x8 bottleneck on PCI-e 3.0 x16 MOBO? As i understand it will work with PCI-e 3.0 x8 speed, correct?
Will bandwitch be enough? i do not know how to check it
 

kanewolf

Titan
Moderator
Will Radeon 6600 (non-XT) which is on PCIe 4.0 x8 bottleneck on PCI-e 3.0 x16 MOBO? As i understand it will work with PCI-e 3.0 x8 speed, correct?
Will bandwitch be enough? i do not know how to check it
It should be fine.
How to check? Look for reviews of that card and find one where they did a PCIe4.0 vs 3.0 comparison.
This is a 6500XT but has good comparison on PCIe -- https://www.techspot.com/review/2396-pcie-bandwidth-test/
Or -- https://www.techpowerup.com/review/amd-radeon-rx-6600-xt-pci-express-scaling/28.html
 

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