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Radeon HD 7700 Series Specifications Surface

Discussion in 'News' started by btarunr, Feb 10, 2012.

  1. btarunr

    btarunr Editor & Senior Moderator Staff Member

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    In the coming week, AMD will release its Radeon HD 7700 series, which aims to increase its competitiveness in the sub-$200 market. The latest specifications exposé reveals AMD's new design strategy: Instead of increasing components such as stream processors and ROPs, which would increase transistor counts, and unnecessarily increase power draw, AMD is counting on a lesser number of better-configured Graphics CoreNext stream processors. While the previous-generation HD 5770/6770 "Juniper" GPU featured VLIW5 stream processors, the new "Cape Verde" GPU, which will go into making up Radeon HD 7770 and 7750, will feature GCN stream processors. Apart from architectural performance improvements, AMD is counting on increased clock speeds to do the trick. The specifications are listed below.

    Cape Verde Physical
    • Built on TSMC 28 nm process, ~1.5 billion transistors
    • 10 Graphics CoreNext Compute Units (CUs)
    • 640 stream processors
    • 40 TMUs, 16 ROPs
    • 128-bit wide GDDR5 memory interface

    Radeon HD 7770
    • All CUs enabled, 640 stream processors
    • 1 GB GDDR5 memory
    • 40 TMUs, 16 ROPs
    • 1000 MHz core clock-speed
    • 1125 MHz (actual), 4500 MHz (effective) memory clock-speed
    • 72 GB/s memory bandwidth
    • 1280 GFLOP/s single-precision floating-point performance
    • Typical board power: 80W
    Radeon HD 7750
    • 8 CUs enabled, 512 stream processors
    • 1 GB GDDR5 memory
    • 32 TMUs, 16 ROPs
    • 800 MHz core clock-speed
    • 1125 MHz (actual), 4500 MHz (effective) memory clock-speed
    • 72 GB/s memory bandwidth
    • 819 GFLOP/s single-precision floating-point performance
    • Typical board power: 55W
    Source: 3DCenter.org
    xBruce88x says thanks.
  2. Wyverex

    Wyverex

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    These look like a bit worse performers than I expected, but of course I could be very wrong.

    With the ridiculous prices of HD 7900 series, I am now looking forward to HD 7800 series (and Kepler to reduce prices due to competition)
  3. human_error

    human_error

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    Is it me or is the 7770 the first reference (non-factory OC'd) GPU with a clockspeed of 1ghz? Even with a smaller die it should be a decent performer for an 80W card.
  4. Imsochobo New Member

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    The stream processors of the 7 series is diffrent than the 6 and 5 series.
    they will be roughly like 6870 and 6850 while using very little power.
    this is standard for amd.
  5. dieterd New Member

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    "sub-200$" it is NO "previous-generation HD 5770/6770"! again AMD will make us pay 100% of preformance increase. I asume this 7770 preformance will be like 6850 but price at launch even higher!
    thx for nothing, AMD!
  6. afw

    afw New Member

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    7xxx series GCN is not an improvement over the previous architecture. I say that cos when you consider amount of performance:SPs ratio of GCN and the prev gen are identical.

    Based on that I presume 7770's performance will be less than the 6770 cos 7770 has 640SPs and 6770 has 800SPs.
  7. wahdangun

    wahdangun New Member

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    but you missed one little detail. this card is clocked at 1 Ghz and GCN scale perfectly linear
  8. afw

    afw New Member

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    true ... but i dont think a 150Mhz bump in core can negate performance drop from the -20% SPs .. also a 75Mhz drop in memory speeds ...

    I think AMD are doing this deliberately ... may be they want to show a huge jump in performance when they release their 8xxx this year (rumored).
  9. ivicagmc

    ivicagmc

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    I bought 5770 2 years ago for 140e. Now I want double performance for the same money. WTF is this with graphics industry? So many new graphics is out but they just scale up with the price and do little dirty tricks like this with 7770. I just hope that nVidia will fix this with their new generation...
  10. sparkyar

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    "640 stream processors" is less than 1/3 of 7970
    me dont like :(
  11. Crap Daddy

    Crap Daddy

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    AMD decided it's time to cash in until NV shows up. The problem is that pricing so high their top dogs at the performance they offer now they are stuck with offering for what is now their mid-range, from a new generation of cards, same performance for the same amount of money that their previous gen offered.
  12. Over_Lord

    Over_Lord News Editor

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    640SPs?

    Here's hoping it beats the HD6770 by a margin worth speaking of.
  13. Crap Daddy

    Crap Daddy

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    It will, I think it'll be around 6870. The trick is it'll have the same price as the 6870 so you are basically pay the same amount of money for the same performance after almost one a half year.
  14. DarkOCean

    DarkOCean

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    I really doubt it wil beat the 6870 ...This is sad news indeed 640 sps its lame it will be like what 30% power of the 7970 .
    I remember in the 5xxx series when the 5770 used to be half of the high end 5870 and now this.
  15. TC-man

    TC-man

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    To me it feels really similar like those Radeon 9600Pro/XT that were supposed to replace those more powerful mid-end Radeon 9500Pro which had twice the ROPs of a Radeon 9600 (and some Radeons 9500Pro are unlockable to a Radeon 9700 Pro). I guess AMD wants to compensate the lower Streaming Processors count with 1.0 GHz gpu clockspeed to keep up with the performance of the older generation HD 5770/6770 which has 800 SPs, right? On the other hand, one Streaming Processor on these HD 7770 may be significantly more more powerful than 1 Streaming Processor on the older generation HD 5770/6770...
  16. suraswami

    suraswami

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    Both AMD and ATI are fascinated with clock speed!!
  17. _JP_

    _JP_

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    Ok, I wasn't expecting that. Now I'm really curious about these cards.
    Let's go, benchmarks!
  18. crazyeyesreaper

    crazyeyesreaper Chief Broken Rig

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    current performance estimates place these gpu's between the 6790 and 6850 in terms of performance at least in the 3D mark Benchmarks, no real game info yet and its still suspect till reviews.
  19. meirb111 New Member

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    if the price will be like the 6850 the only plus here will be power consumption
    and not preformance per $ :(
  20. STCNE

    STCNE New Member

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    That memory bus will kill it, the 6850 should still hold the lead in some situations.
  21. N3M3515

    N3M3515

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    This is a lost cause man..........i have a HD4870, bought it for 140 bucks almost 3 years ago, and there's nothing right now at that price that can offer me double the performance.

    This is just lame...
  22. Isenstaedt

    Isenstaedt New Member

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    But the MSRP of the 4870 was $299. Both the 6950 1GB and the GTX 560 Ti double it's performance and are cheaper than that.
    Last edited: Feb 11, 2012
  23. Lost Hatter

    Lost Hatter

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    That suxx. I read they would have 940 Stream processing units. Guess that info was bunk :( 6870 here i come!
  24. Casecutter

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    It feels like almost the same strategy/play AMD did when they bumped the 4850/4870 only slightly with the 5750/5770 release. 4870 had gotten as low as $130 -AR and they release a lower power version that since drivers matured is as or faster than a 4870. History repeats... Sure the 7770 at for a “sub $200” at the start feel harsh, but 6870 (original MSRP $239) performance, while there’s the TSMC price increase on 28Nm in that so it’s not out of line. If they have nice coolers / AIB custom (OC’d?) straight away $180 isn’t bad for a card pulling 80-90W for that level performance, or can they get by without a 6-pin! :toast:

    Then the 6850/6870 will again elevate in the product mix.
    Last edited: Feb 10, 2012
  25. N3M3515

    N3M3515

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    So what? i bought it at 140 bucks man......i don't care if it started at 299......
    And......again......what can you buy with 140 bucks right now that performs 100% better than my 2 and a half years old vcard?
    Last edited: Feb 11, 2012

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