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Thread: PCI Express




  1. #21
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    NVIDIA demonstrates PCI Express technology at CES

    NVIDIA, the worldwide leader in visual processing solutions, today (January 9th, 2004) announced it is demonstrating its PCI Express architecture at the Consumer Electronics Show. PCI Express is the next revolution in I/O interconnect standard that NVIDIA will deploy in future graphics solutions as the next step in delivering the bandwidth and features required for high-resolution graphics, games, and other graphically-intensive applications.

    PCI Express significantly increases bandwidth between the central processing unit (CPU) and graphics processing unit (GPU) by enabling a balanced distribution of bandwidth to those applications that require it the most. NVIDIA‘s PCI Express bridge chip, an industry first, affords the flexibility to instantly adapt a variety of the Company’s award-winning GPUs to the new PCI Express bus technology with the full capabilities and throughput offered by PCI Express.

    “To create a sixteen lane PCI Express bridge chip that works without performance degradation is a huge technological advancement,” said Dan Vivoli, executive vice president of marketing at NVIDIA. “The use of a PCI Express bridge chip gives NVIDIA a decisive competitive advantage in what is the most exciting graphics bus transition in recent history.”

    “Intel has been working with PCI Express validation collaborators such as NVIDIA to implement this exciting new I/O interconnect standard,” said Randy Wilhelm, vice president, Desktop Platforms Group and general manager, Client Platform Division at Intel Corporation. “The validation of NVIDIA products with PCI Express will help ensure interoperability with future leading-edge Intel platforms.”

    Nvidia Press Office

  2. #22
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    cool :thumb: , but is PCI-Express going to come out for for AMD's too? And is Ati in on this? I know I've read charts where the Loki is supposed to be PCI-Express, but I was just wondering. : peace2: Mista K6
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  3. #23
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    Mista K6: PCI Express is the new industry standard, so yes AMD, ATI, Intel and Nvidia etc will all be offering products that support it.

  4. #24
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    Leadtek PCI-Express GeForce FX 5200

    <img src="http://images.tweaktown.com/weta/leadtek/pcix5200.jpg">

    Over at the Leadtek booth we were able to take a peak at a PCI Express version of the NVIDIA GeForceFX 5200. NVIDIA won't be releasing GPUs with native PCI-Express initially, but will rely on bridged solutions to handle the translation from the multiple serial busses to the cards native AGP interface. In the image above, we can see that the bridge chip has a heat sink on it. We were unfortunately unable to coax anyone into letting me pull the black metal off for a picture of the bridge chip itself.

    AnandTech

  5. #25
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    Does anyone know approx what the perfomance benefits will be, could be large, or insignificant like i've heard AGP 8x is compared to 4x.

  6. #26
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    About PCI Express

    In my opinion, PCI-E will have a major impact on how games are designed because you should be able to finally read from the graphic chip memory without breaking the streaming of the transactions between the core logic and the GPU. PCI-E is a point to point bus meaning that it works just like HyperTransport (dedicated upstream/downstream). On AGP, when you switch between read and write, you have to turn around and that takes time.

    This should allow a new range of algorithms to be possible (like on consoles). You could use the GPU to calculate very quickly zone of dangers when the player is throwing a grenade (physic blast shadowing). The information could then by passed to your AI and Physics engine to help the AI make a good decision on how to react to this event and to find out which objects should be impacted (where and how) by the blast. This kind of shadowing algorithm may or may not be efficient (compared to distributed ray casting) but it gives some ideas.

    So overall, PCI-E won't have direct impact on rendering but it will have a big impact on engine design (only programmers will notice but games are going to get better more quickly).

    All of this can be done on the CPU but people are going to start looking at the GPU to do other things than just graphics. All of this because of PCI-E.

    Written by Dany Lepage, Lead Programmer, Splinter Cell - X, UbiSoft, Montreal

    Beyond 3D Forums

  7. #27
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    Originally posted by [b]weta
    All of this can be done on the CPU but people are going to start looking at the GPU to do other things than just graphics.
    I'm not sure if that's a good thing or not ?! :confused: :shrug:
    SPAM Special Ops

  8. #28
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    PCI-Express cards

    Muyu found an interesting link over at B3D forums which pointed to perhaps the first real benchmarks of PCI Express cards. The cards in question are a PCI express version of a GeForce FX 5200 card from NVIDIA and a PCI express version card of a 9600XT from ATI. Click on the headline for a translated link but the last page is the most interesting with actual benches. Seems the first iterations or engineering samples do not benefit from PCI express but, it must be pointed out that the cards and setup included in that preview are but engineering samples.

    More information

    Beyond 3D Forums / NV News

  9. #29
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    Ya been readig a lot about pci express for quite awhile now. But i thought they was expexting to have express out by the 1q or 2q of 2004.. Been waiting to upgrade computer till the pci express comes out.. And a question to go along here... Does this affect the PCI frequency speeds or will old pci cards like sounds cards and such work ok.. with the 66 mghz boundary most hardware is limited to.

  10. #30
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    PCI and PCI Express are two different buses with different sockets as shown in the pic below (white slots are PCI while the black ones are PCI Express, the large one bein' 16x slot for video cards and the smaller ones 1x slots but 2x, 4x and 8x slots will likely follow) but PCI Express also has different sized sockets.

    <img src="http://www.hkepc.com/hwdb/pciexpressvga/pciexpressslot.jpg">

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