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13-Way Radeon Graphics On Ubuntu 14.04 LTS

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  • #16
    If I believe the data on Wikipedia and x.org RadeonFeature web page:

    the Radeon R7 260X (codenamed BONAIRE) is just an overclocked version of the Radeon HD 7790.
    the Radeon R7 265 (codenamed PITCAIRN) is just a slightly overclocked version of the Radeon HD 7850.

    Both use the radeonsi mesa driver.

    If I have to buy one, I would definitively take the R7 265 (more shader cores and a 256-bit VRAM bus).
    Last edited by whitecat; 04-04-2014, 02:05 PM.

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    • #17
      Originally posted by Spectre View Post
      I'm still having problems with the frame rate dropping over time issue with my 7790. I found that if I alt-tab out of fullscreen and go back in again the frame rate goes back to a smooth 60. But once again over time drops down. I can do this twice or three times before it no longer works. I'm sure they're working on it so just gotta sit tight.
      I haven't seen this behavior and no one has reported anything similar. Please file a bug (https://bugs.freedesktop.org). Bugs that aren't reported don't often get fixed.

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      • #18
        Originally posted by agd5f View Post
        The A10-7850k is a Kaveri. the R7 260 is a Bonaire. Both have the same 3D engine on them, but neither should be unusually slow with kernel 3.14 or newer where dpm is enabled. None of my bonaire or kaveri systems are that slow.
        Damaged card maybe? Bad vBIOS?

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        • #19
          Originally posted by whitecat View Post
          If I believe the data on Wikipedia and x.org RadeonFeature web page:

          the Radeon R7 260X (codenamed BONAIRE) is just an overclocked version of the Radeon HD 7790.
          the Radeon R7 265 (codenamed PITCAIRN) is just a slightly overclocked version of the Radeon HD 7850.

          Both use the radeonsi mesa driver.

          If I have to buy one, I would definitively take the R7 265 (more shader cores and a 256-bit VRAM bus).
          Do you have any idea how it(the 265) would compare to the nvidia GTX 660 with the binary blob by chance?

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          • #20
            Originally posted by Ericg View Post
            Damaged card maybe? Bad vBIOS?
            Not damaged, given it was running the blob flawlessly yesterday: http://www.phoronix.com/scan.php?pag...0_source&num=2

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            • #21
              Originally posted by peppercats View Post
              Do you have any idea how it(the 265) would compare to the nvidia GTX 660 with the binary blob by chance?
              I don't know but given the HW data I have on them and the results of:
              http://www.phoronix.com/scan.php?pag...ty_30way&num=1
              and
              http://www.phoronix.com/scan.php?pag...0_source&num=1

              I will extrapolate that they have pretty the same performance.

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              • #22
                Interesting to see there are some great performance wins for radeon in Xonotic High test when compared with fglrx from january . Seems like 7850 and 6870 with radeon there has nearly double performance


                http://openbenchmarking.org/prospect...a2eae41ba1df4b

                http://www.phoronix.com/scan.php?pag...eri_gpus&num=3
                http://openbenchmarking.org/prospect...a2eae41ba1df4b

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                • #23
                  Originally posted by Ericg View Post
                  Damaged card maybe? Bad vBIOS?
                  I wasn't able to find any benchmarks with the 260X and 3.14 kernel, so this must have been something Michael encountered at some other point. Could be a red herring, I guess, or maybe he's talking about the performance regressions (HyperZ ?) he covered recently, although if that were the case then 260X would still be much much faster than what we see here..

                  Assuming Ubuntu 14.04 didn't pick up the CI dpm fixes from the 3.14 kernel the performance in this article isn't out of line, so all we're talking about is Michael's comment about seeing similar issues with the 3.14 kernel. That's the part that doesn't sound right, without more details we're really just all guessing at the moment.

                  We know from the Kaveri benchmarks that enabling dpm on CI makes the expected difference in performance.

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                  • #24
                    @bridgman
                    (Unrelated to the news)
                    "CIK" stands for the Sea Islands series? Why this name?
                    I guess the "CI" is for "Sea Islands" and because "SI" was already used for "Southern Islands". What does the "K" means?

                    The Radeon codename are quite odd today...

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                    • #25
                      @whitecat

                      I think it was C for Sea Islands (CI), I for Indus (platform name for Kaveri), K for Kerala (platform name for Kabini). Something like that.
                      http://www.phoronix.com/forums/showt...423#post401423

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                      • #26
                        Originally posted by bridgman View Post
                        I guess, but there probably weren't a lot of naming options for a card that falls between 260X and 270 in performance. Calling it the "270 Lite" probably wouldn't fly.

                        The number seems more reasonable if you look at it as a performance metric rather than a GPU die identifier, of course.
                        That does make sense. Though I still don't get why it was necessary to use NVIDIA's "Ti" notation (just translated to "X") in the first place. Why not 260, 261, 265 and 270 or such?

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                        • #27
                          I remember seeing on TV that people generally prefer product names with an "X" in them

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                          • #28
                            Originally posted by dungeon View Post
                            Thank you!

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                            • #29
                              Most funnier name for me was Radeon X1950 XTX .

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                              • #30
                                Originally posted by dungeon View Post
                                Most funnier name for me was Radeon X1950 XTX .
                                Hopefully, at that time Sapphire hasn't yet released their Vapor-X series

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