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Thread: R420 Loki




  1. #31
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    ATI next generation hardware at IDF

    However of more interest was that it appears that ATI’s future high end part R420 made a small appearance. According to Tweakers.net, in a short part discussing the GDDR-3 graphics memory, which currently has speeds in the range of 500 - 700MHz (1 - 1.4GHz effective) ATI demonstrated a demo of the upcoming, DirectX9 heavy title, Colin McRae Rally 4 on an R420, which was quoted as running at 2 - 3 times faster than present DirectX9 capable hardware. We contacted ATI to verify if this was R420 and they stated that they had demonstrated the title running on their future "Next Generation Hardware" which is as good an confirmation of this being R420 as you can get.

    Rage 3D / Beyond 3D

  2. #32
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    ATI 420 won't support Pixel Shader 3.0

    Ok, I've just read a Babelfish translation of 3DCenter article, so forgive if I talk like the fish Diskussionstuff wird meat cleaver ajax. The article's key point is that ATI's next-generation chip will not support the Pixel Shader 3.0 specification. In fact, 3DCenter says, "We can confirm free of doubts that the ATi R420-Chip will not offer Shader 3,0 support." That sounds fairly certain, no?

    They outline a very convincing argument based on the rumored history of the R400 project. For those who haven't heard, the rumor is that ATI started work on a next-gen chip, then canceled it and decided to do an upgrade to the R360 (found in the Radeon 9800XT) instead. Hence, R420 will be an updated R360 with a die shrink and more transistors. Those extra transistors are likely to be dedicated to additional vertex shader units on the chip, improved pixel shaders, and err.. other stuff. 3DCenter thinks maybe additional texture units per pixel pipe could be in the works.

    I'm persuaded by this 3DCenter's argument because it jibes with ATI's basic approach to graphics since the R300. I explored the basics of that approach in this article some time back. Pixel Shader 3.0 adds things like improved flow control, longer shader program instruction limits, and more arbitrary instruction mixes. PS 3.0 also moves toward a unified pixel/vertex shader model without taking the final steps. So PS 3.0 is elegant, but not necessary. PS 3.0 doesn't add precision or new visual output capabilities. ATI might do just as well rendering more complex shader programs—likely compiled from High-Level Shader Language programs—into multi-pass operations on R3x0 and R420, using an F-buffer to store results between passes. Since the first DX9 chips were in the works, NVIDIA has been a proponent of more complex shaders and more CPU-like instruction pipelines, while ATI got a faster chip to market sooner by keeping things simple.

    I think this rumor also might explain Microsoft's apparent reluctance to name the next DX9 release DirectX 9.1. ATI may be pushing them to call it 9.0c in order to preserve "DirectX 9 support" as the primary checkbox feature for GPUs.

    Intriguing stuff, and the timber for many a future flame war, if these rumors prove true.

    The Tech Report / 3D Center

  3. #33
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    R420 "Skateboard" specs update

    0.13 micron process low-k
    160M transistors
    ~500MHz core clock
    ~1000Mhz memory clock
    256-bit memory interface
    Two versions : 256MB GDDR3 or 256MB DDR-I
    8 pipelines
    6 vertex engines
    2x pixel fill rate and vertex of R350
    AGP 8X
    VGA, DVI and VIVO ready
    Supports DirectX 9.0c
    Launch in March

    VR Zone

    "Skateboard" is ATI's codename for this release

  4. #34
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    Whilst unconfirmed, this could be ATI's R423, the PCI-Express version of its soon to be announced R420 graphics card.

  5. #35
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    Update: This card has turned out to be a PCI-Express version of ATI's 9600 XT. (see previous post)

  6. #36
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    Unauthenticated ATI and NVIDIA roadmaps published by Chinese website GZeazy reveal new product titles, ATI R420 - Radeon 9900 and NVIDIA GeForce 6???.

  7. #37
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    Radeon 9900
    Wonder what will happen after the 9900? End of the Radeon series :shock:
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  8. #38
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    LOL, yea Radeon 10000 doesn't sound very good, does it?
    [size=9If there's a pensieve fear, a wasted year, a man must learn to cope.
    If his obsession's real, suppression that he feels must turn to hope - DT

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  9. #39
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    I bought ATI for the first time with my last purchase...I was really impressed by them so I'm hoping to stick with them.
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  10. #40
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    Quote Originally Posted by benny_mankin
    LOL, yea Radeon 10000 doesn't sound very good, does it?
    noo silly, its Radeon 10 to the 3rd power.

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