how can i find out the USB version on my computer?

hi experts,

 I have a compaq evo W4000 and I'm looking to connect a 3tb external drive. However, the one I want to purchase is usb 3.0 and its not backward compatible with older USB version. How can I figure out if my system supports 3.0?
frankbustosAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Certified USB 3 devices were available from 2010, Las Vegas - CES. (standard was defined in 2008)

I also not sure why you state that your USB 3.0 device is not backwards compatible with older USB version.

USB Superspeed (USB 3.0) is backwards compatible, as per the spec, here

quote from the spec

"SuperSpeed USB is backwards compatible with USB 2.0. Devices interoperate with USB 2.0 platforms. Hosts support USB 2.0 legacy devices."

http://www.usb.org/developers/ssusb/
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dbruntonCommented:
If this is it http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00328243&lang=en&cc=us&taskId=101&prodSeriesId=369340 then it doesn't.

That machine came out in 2002 and USB 3.0 came out in 2009.
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saastechCommented:
You may want to get a PCI card for USB 3.0.

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frankbustosAuthor Commented:
ok, buying a pic card usb 3.0 will do the trick?
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☠ MASQ ☠Commented:
Your EVO has USB 1.0 but even if you add a PCI expansion board to it to support USB 3.0 the limiting factor on data transfer will be the PC & not the drive.  It will work but you won't get the full benefit of the improved transfer speed until you replace the PC.
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dbruntonCommented:
If you can find one.

They all seem to be PCI Express cards.

But they do seem to exist.  See http://www.costcentral.com/proddetail/StarTechcom_2_Port_PCI_SuperSpeed_USB_30_Card_Adapter/PCIUSB3S2/11318036/extended/ but note that it is low profile so I don't know if it will fit in your system.

Check that any card you get has drivers for your operating system.  I presume you are using Windows XP.

Note that you will NOT get USB 3.0 speeds if you get a PCI card.
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RanjithskCommented:
Hi,

In the Workstation Options document of Compaq ftp://ftp.compaq.com/pub/supportinformation/techpubs/qrg/workstation_options_rev9_us.pdf does not mention availability of USB 2.0 PCI card for evo W4000. It starts from W6000. So the chances of USB 2.0 support is very less.


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saastechCommented:
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dbruntonCommented:
He has PCI slots not PCI Express which is what you've linked to.
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saastechCommented:
Maybe out of luck without a PCI Express slot :(
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
do you need fast access to your storage, or just 3TB of additional storage?
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frankbustosAuthor Commented:
bought usb 3.0 and it was backwards compatible with 2.0
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