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Thread: AMD Radeon HD 4870 X2 On Linux

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  1. #1
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    Default AMD Radeon HD 4870 X2 On Linux

    Phoronix: AMD Radeon HD 4870 X2 On Linux

    While details on AMD's high-end ATI Radeon HD 4870 X2 graphics card began surfacing last month, today this dual-GPU graphics card has formally launched and will begin shipping to retailers. The good news this time around is that this graphics card will actually be something worth looking at under Linux now that there's the needed CrossFire support on the horizon. We're not yet permitted to publish the Linux CrossFire benchmarks, but today we have a few pieces of information to share about the Radeon HD 4870 X2 on Linux.

    http://www.phoronix.com/vr.php?view=12734

  2. #2
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    Heh, you sound like you could know when the new driver is out

    Whatsoever, I'm really looking forward to seeing some benchmarks and how well Crossfire setups scale, keep up the good work!

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    I can't even imagine what bad things would happen if the users knew the driver's version you've used (I know this has been brought up before)

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    Oh sure, Crossfire support! I wish they would support the latest XOrg (the one used by Fedora 9) instead! Got this great new card and I haven't been able to use it AT ALL in the last couple of months. Even video stutters. *sigh*

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    Quote Originally Posted by quintesse View Post
    Oh sure, Crossfire support! I wish they would support the latest XOrg (the one used by Fedora 9) instead! Got this great new card and I haven't been able to use it AT ALL in the last couple of months. Even video stutters. *sigh*
    First things first, the demand for crossfire under Linux has been there for a much longer time than the demand for Xorg 7.4 support.
    Apart from that, that Xorg "release" is not even out or considered stable yet. The official Catalyst driver, as bridgman once stated, is intended for everyday use on stable systems, which don't use the bleeding-edge development trees, whereas radeon and radeonhd are intended to support them.

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    Quote Originally Posted by NeoBrain View Post
    First things first, the demand for crossfire under Linux has been there for a much longer time than the demand for Xorg 7.4 support.
    Apart from that, that Xorg "release" is not even out or considered stable yet. The official Catalyst driver, as bridgman once stated, is intended for everyday use on stable systems, which don't use the bleeding-edge development trees, whereas radeon and radeonhd are intended to support them.
    If fglrx doesn't work, you are forced to go git master to get your card working with radeon/radeonhd. If ATI later says "we fixed it", it would much easier if I could try it out myself on X.Org 7.4 rather than spending the evening downgrading to 7.3 only to discover that it still doesn't work and then having to upgrade again to git.

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    Quote Originally Posted by RealNC View Post
    If fglrx doesn't work, you are forced to go git master to get your card working with radeon/radeonhd. If ATI later says "we fixed it", it would much easier if I could try it out myself on X.Org 7.4 rather than spending the evening downgrading to 7.3 only to discover that it still doesn't work and then having to upgrade again to git.
    hm.. I see where your problem is; however, then you could also stick with Xorg 7.3 and use radeonHD 1.0, so you need only one downgrade at all. But if you insist on having 3d acceleration it's not as easy as "if fglrx doesn't work I use radeon(hd)", exactly because of what you described. One must decide wether he sticks with some 3d accel that works with radeon(hd) or wether he gets full 3d accel IF he gets his fglrx running.
    I guess in your case it'd be best to spent ~5GB for a second distribution installation in order to test wether a new fglrx release fixed your problem.

    I now that's not really the answer you want to hear, but it's the sad reality that binary blobs don't fit too well in the OSS world

  8. #8
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    Agreed. Better to work on 3D (OpenGl, memory management, etc.) if resources are limited. No need to have things not work (up to) twice as fast.

    Of course, making the code "Crossfire clean" could have benefits elsewhere.

  9. #9
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    wait, didn't AMD redo the codebase for fglrx not too long ago? Didn't Crossfire exist when they did that? Why are they molesting code to get it working now?

    I know I shouldn't expect much from fglrx, but this is something they should have seen coming.

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    Quote Originally Posted by jeffro-tull View Post
    wait, didn't AMD redo the codebase for fglrx not too long ago? Didn't Crossfire exist when they did that? Why are they molesting code to get it working now?

    I know I shouldn't expect much from fglrx, but this is something they should have seen coming.
    Well, actually they didn't rewrite their whole codebase. It was "just" the 3d part and one more low-level thing in order to improve performance and add AIGLX support. The part was (well, at least mostly) completely independant from any future Crossfire support, so it would have been the same mess anyways.
    By the way, the driver was buggy enough with 8.42, I don't even want to imagine how buggy it would've been if they even had Crossfire implemented at that time.

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