USB <--> PCIe

[WayneS1324]

How does the speed of USB DAQ devices compare to the speed of PCIe cards (analog and digital)?

By that I mean if a USB DAQ can take X measurements per second  and a PCIe card can take Y measurements per second,

how do X and Y compare to each other?

[crossrulz · Accepted solution]

If it is the same model number, they are equal.  I highly recommend going with PCI(e) anyways since I seem to have nothing but problems with USB (it got unplugged, Windows decided to remove USB bus power, etc etc et).

[WayneS1324]

Thanks for the reply.

I want to move from C# and/or LabWindows and give a project a go with C++. USB devices are eaiser to interface with.

[crossrulz]

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@WayneS1324 wrote:

USB devices are eaiser to interface with.

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Not really.  DAQmx takes care of it all for you.  So there is not really any difference other than the initialization (where you define which channels to be in a task).