PCI-E 3.0 X16 vs PCI-E 2.0 X16

Hey guys. I am getting a R9 270X video card and I need to know if it will work in a PCI-E 2.0 X16 slot, specifically the one on this motherboard ASRock 980DE3/U3S3 AM3+ AMD RX881/760G
Or does it need a PCI-E 3.0 X16 slot?
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  1. It will work fine on a PCIE 2.0 slot. Difference is negligible for a single R9 270X
  2. Yes, of course. PCIe is a backward compatible interface. Besides, no card today can saturate the bandwidth of even 2.0
  3. http://www.pugetsystems.com/labs/articles/Impact-of-PCI-E-Speed-on-Gaming-Performance-518/
    Impact of PCI-E Speed on Gaming Performance


    Here's a good read ^
  4. SR-71 Blackbird said:
    http://www.pugetsystems.com/labs/articles/Impact-of-PCI-E-Speed-on-Gaming-Performance-518/
    Impact of PCI-E Speed on Gaming Performance


    Here's a good read ^


    Yeah, that 9 month old article pretty much confirms what so many folks here hate to accept. That even PCIe x8 @ 2.0 isn't realistically any slower in real life gaming than PCIe x16 @ 3.0... today. I have kinda confirmed that myself with my old Z68 MB @ x8,x8 SLI and CF.

    From what I've read, PCIe x16 3.0 was mainly developed for PCIe SSDs because they were becoming bottlenecked by the SATA interface.
  5. You will see a gain from 4x to 8x, but 8x to 16x is negligible.
  6. Yeah, x4 is a crippler. I tried that once with a x16, x4 board. The end result was poorer performance in some games that the single card alone. That was back when I thought 2 x HD 6850s in CFx were pretty hot... lol.
  7. clutchc said:
    Yeah, x4 is a crippler. I tried that once with a x16, x4 board. The end result was poorer performance in some games that the single card alone. That was back when I thought 2 x HD 6850s in CFx were pretty hot... lol.
    Even there, all the double GPU cards are sharing the 16X bandwith to 8x per GPU. Going 16x16x doesn't change much since all cards are designed to be performing in 8x.
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