Is a PCIE X1 card for USB 3.0 worth it?

Posted by lelouch on Super User See other posts from Super User or by lelouch
Published on 2011-11-23T00:36:50Z Indexed on 2011/11/23 2:00 UTC
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pci-express

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expansion

I have a portable HDD on USB 3.0, and soon I'll have a 32gb flash drive on USB 3.0 as well.

My motherboard is pretty old - and the next time I'll upgrade it is when I get a new CPU/mobo/ram.

Slots on my mobo:

PCIE X16 - For my GTX 260

2xPCI

PCIE X1

I'm considering purchasing a PCI express X1 card like this - http://www.ebay.com.au/itm/PC-Laptop-2-USB3-0-Ports-PCI-E-PCI-Express-X1-Card-New-/280772000446?pt=AU_Networking&hash=item415f50babe

Now the question:

What are realistic (read/write) speeds I'll get in this setup, assuming I have 1 USB 3 device connected at a time, and the bottleneck is the PCIE?

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