[SOLVED] Onboard USB 3.0 vs PCIe 3.0 TO USB 3.0 card latency difference not speed difference

polis_putrus

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Apr 24, 2018
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Will a PCIe 3.0 to USB 3.0 card have less latency than an onboard USB 3.0 connector

Ive found tons of hardware maps like this one

it shows the pcie lanes going diretly to the cpu and the usb ports go through a chipset or something before they reach the cpu, so is the latency less?

Not speeds, latency.
 

tshinhar

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May 27, 2015
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It is completely the same, latency AND speed
You have no benefit using a pcie USB card over the onboard USB ports
For graphics cards and pcie ssds you can see benefits using the cpu pcie lanes for the increased bandwidth
For usb it is pointless
 

tshinhar

Reputable
May 27, 2015
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It is completely the same, latency AND speed
You have no benefit using a pcie USB card over the onboard USB ports
For graphics cards and pcie ssds you can see benefits using the cpu pcie lanes for the increased bandwidth
For usb it is pointless
 

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