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Am 15.04.2012 16:22, schrieb Michael Mol: |
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> On Sun, Apr 15, 2012 at 10:09 AM, Florian Philipp <lists@×××××××××××.net> wrote: |
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>> Am 15.04.2012 15:18, schrieb Walter Dnes: |
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>>> On Wed, Apr 11, 2012 at 06:30:02PM +0200, Volker Armin Hemmann wrote |
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>>>> Am Mittwoch, 11. April 2012, 02:11:35 schrieb Walter Dnes: |
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>>>>> |
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>>>>> If it's PCIe, so be it. Actually, a post that prevents me wasting |
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>>>>> money is helpful <G>. Would PCIe be significantly better on the same |
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>>>>> CPU+GPU, or is it hype? |
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>>>> |
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>>>> a lot, lot lot lot better. No hype. |
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>>> |
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>>> I've done some looking, and I'm back with more questions. I've also |
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>>> read the Nouveau-versus-NVIDIA thread. Questions... |
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>>> |
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>>> 1) Will PCIe 2.0 cards work in a PCIe 1.0 slot? I'm not expecting 2.0 |
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>>> performance, I just want full backwards compatability. PCIe 1.0 cards |
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>>> seem to be rare, and have to be ordered online, while I can pick up a |
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>>> 2.0 card locally at a store. |
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>>> |
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>> |
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>> PCIe-2.0 is fully downward compatible to 1.1 and 1.0. |
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>> |
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>>> 2) My main "torture test" will be HD fullscreen video. Will there be |
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>>> major improvement in that? That's 2D. Forget 3D. |
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>>> |
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>> |
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>> 2D video is still rendered using OpenGL if your video player supports it. |
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> |
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> I'm not aware of any video decoders using CUDA, OpenCL, or pixel |
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> shaders for video decoding; AFAIK, unless you're using VDPAU you're |
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> still using the CPU to render the video to a frame buffer. The most a |
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> video player is going to use OpenGL for is stretching that frame |
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> buffer to fit a window or screen, and possibly as a compositor to |
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> place overlays like subtitles or playback control elements.. |
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> |
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|
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Agreed. Decoding is still usually done in software but offloading |
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scaling and YUV to RGB conversion helps none the less. Mplayer, for |
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example, allows a lot of customization depending on the amount of |
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texture units. With high resolution displays and slow CPUs, this can |
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have surprisingly large effects. |
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|
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Regards, |
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Florian Philipp |
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