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PCI-E 2.0 AND 3.0

hi there,i was looking at some of the new radeon 7870 graphics cards and i noticed that they are PCI-E 3.0..i am wondering if these are compatible with PCI-E 2.0 on my motherboard and system for a possible upgrade in the future,my system has the following spec"s..thank you...


core I5 2500k

asrock pro3 mobo

gtx560 ti gainward

650watt true power psu

1tb wd caviar black hd

cm storm case

windows 7 home premium
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  1. Best answer
    You only need to worry about which PCIe revision your board supports if you're looking at the highest end cards, like the GTX 590/690 and HD 6990. Even then a lowly PCIe 1.1 board can provide about 95% of the performance of the card.

    In short: Don't worry, be happy!
  2. Yes PCI-E slots are backwards compatible.

    Here's a benchmark comparison with a 7970.
    [Hardwarecanucks]HD 7970 PCI-E 3.0 vs PCI-E 2.0 comparison
    http://www.overclock.net/t/1188376/hardwarecanucks-hd-7970-pci-e-3-0-vs-pci-e-2-0-comparison
  3. The 7870 is backwards compatible. You'll be fine.
  4. ahh i see,so the 7870 card will be fine,i like the price for the performance of these cards,they look very good..thank you for all the replies on this post
  5. Best answer selected by mrclownface.
  6. This topic has been closed by Mousemonkey
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