Solved Ways to Check PCIE Speed X8, X16 ?

January 28, 2020 at 02:24:20
Specs: Windows 10, 1600X / 2666 Corsair LPX

Within GPU-Z the PCIE speed reports PCI-E speed of X8 . Either there is something wrong with the motherboard , or the reporting ; my gut feeling is the reporting is not working correctly

What other ways can I verify the speed of the PCIE port ? I read there is a throughput/ bandwidth test I can do ? I read before that someone had GPU-Z report incorrectly and could verify by looking at throughput/bandwitch of the PCIe Lane

Things I already tried
Updating BIOS
Removing NVME /
Changing SATA drives Ports
Changing GPU
Changing CPU


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#1
January 28, 2020 at 04:46:32
You didn't include the make/model of the board, but did you check the specs?

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#2
January 28, 2020 at 04:56:53
Its a B450M A Asus .

I have a Ryzen 1600 - in response to below ( fully capable of PCIE X 16 )


I am not here to determine specs on machines , I am asking about methods of f measuring the real life performance of cards , then comparing them to the PCIE Speeds advertised .


message edited by 90Ninety


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#3
January 28, 2020 at 08:28:42
✔ Best Answer
It appears the CPU dictates the PCIe mode. From the specs:

3rd/2nd/1st Gen AMD Ryzen™ Processors
1 x PCIe 3.0/2.0 x16 (x16 mode)
2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics Processors
1 x PCIe 3.0/2.0 x16 (x8 mode)
AMD Athlon™ with Radeon™ Vega Graphics Processors
1 x PCIe 3.0/2.0 x16 (max at x4 mode)

https://www.asus.com/us/Motherboard...


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#4
January 28, 2020 at 21:17:59
Also on many boards if there are two 16X slots being used they both defer to 8X mode. This can be graphics card and PCIe SSD drive. I don't know AMD well so I could not tell you for sure on yours.

You have to be a little bit crazy to keep you from going insane.


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#5
January 29, 2020 at 07:28:57
Have you tried CPU-Z?

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