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How can I tell if my motherboard has a PCI Express x16 2.0 graphics slot or a 3.0 graphics slot?

In the motherboard, it just says "PCIe x16" next to the graphics slot. I tried finding out the name of it before but I couldn't. This is an Acer PC I bought which I am planning on upgrading.
I'm planning on getting one of these graphics cards:
- http://www.ebay.com/itm/NEW-MSI-R7770-PMD1GD5-AMD-RADEON-HD-7770-GHz-Edition-1-GB-128-bit-GDDR5-PCI-/271322905646?pt=PCC_Video_TV_Cards&hash=item3f2c1afc2e
- http://www.ebay.com/itm/Sapphire-AMD-Radeon-HD-7770-PCI-E-x16-1GB-GDDR5-ATI-Graphics-Card-1GHz-Core-/271330936660?pt=PCC_Video_TV_Cards&hash=item3f2c958754
- http://www.ebay.com/itm/Sapphire-FleX-AMD-Radeon-HD-7770-GHz-Edition-1GB-GDDR5-2DVI-HDMI-DisplayPort-/350966448096?pt=PCC_Video_TV_Cards&hash=item51b73affe0
I know they are pretty much the same card... but does the manufacturer matter? Two of them are called GHz edition.

Are the 2.0 and 3.0 stuff really necessary?
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  1. Best answer
    Every r7770 is the same card they are all
    Built on the reference card reason makes and the individual company's just stick after market coolers on them and they might overclock them

    As for the question you'll be fine if it turns out it's a 2.0 and not 3.0 your cards will still run fine and you won't see much if a performance difference!
  2. Radeon* stupid iPhone auto correct
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