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AMD Radeon HD 7790 Physical Specifications, Release Date Confirmed

Discussion in 'News' started by btarunr, Mar 21, 2013.

  1. btarunr

    btarunr Editor & Senior Moderator Staff Member

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    A presentation slide, allegedly by AMD, leaked by a Japanese distributor confirmed specifications of AMD's upcoming Radeon HD 7790 graphics card. According to the slide, the HD 7790 is indeed based on a brand new silicon, with a transistor count of 2.08 billion. Compare that, to the 1.5 billion TC of "Cape Verde," and 2.80 billion of "Pitcairn." The silicon is built on the 28 nanometer silicon fab process.

    The clock speed mentioned in the slide could be core, which is clocked at 1.00 GHz. Next up is the stream processor count, which stands at 896. The HD 7790 is mentioned to feature a primitive rate of 2 prim/clk, suggesting that its component hierarchy is more similar to "Tahiti" than "Cape Verde," which could mean double the tessellation processing power. All said and done, the HD 7790 belts out 1.79 TFLOPs of floating-point performance. The source goes on to mention in its text that the card features a 128-bit wide memory interface, memory clock speed of 6.00 GHz (96 GB/s), a TDP of 85W, and a single 6-pin PCIe power connector. It is expected to launch no later than tomorrow (22/03).

    [​IMG]

    Source: Hermitage Akihabara
     
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  2. TRWOV

    TRWOV

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    Great, just after I bought 2 7770s for WCG :mad:
     
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  3. sergionography

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    interesting, this could very much be the gpu in the xbox next(assuming they dont use an apu)
    otherwise i dont see why they would use a tahiti like setup, unless they tuned it to get the benefits without losing out on gaming efficiency for a next get part, but this time around instead of rebadging, u get new setups under the same naming

    another thing to note this very interesting considering it might be aimed as a next gen parts as amd has always aimed for a 1/3 2/3 3/3 configuration on gpus when possible especialy when on the same node and same architecture, since vliw5 and vliw4 it hasnt work out much cuz it was a bit of a mess
    but with gcn they did so with 640 - 1280- 2048(slightly off but almost 3/3)
    and if this is 896 then thats 1/3 of 1792 for the so called 8870, and with a 3/3 config u get 2688 which could be on the drawing board at amd to target titan
    also with this being 85w tdp its rated almost similar to h7750 and 15w lower than 7770. so that being said it seems amd has tuned gcn while delivering better compute with a 2prim/clock configuration!


    so to start with some speculations

    hd 8970 - 2688 tenerife? ----225w
    hd 8950 - 2304 -------------200w
    hd 8870 - 1798 hainan?-------175w
    hd 8850 - 1536---------------150w
    hd 8830 - 1440---------------125w
    hd 8770 - 896 bonaire--------85w
    hd 8750 - 768-----------------50w-75w
    below - 384-------------------10-50w
     
    Last edited: Mar 21, 2013
  4. Delta6326

    Delta6326

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    Sounds good to me. I was hopping for a bigger memory bus, but we will see in W1zz review.

    At first I thought it said 79 TFLOPS because on the TPU APP the zoom button don't go away and it blocked the "1." 79 lol. Those keep blocking many things.
     
  5. Xzibit

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    It was foretold..

    [​IMG]

    Figure out if its Bonaire Pro or XT first.. :p
     
    Last edited: Mar 21, 2013
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  6. sergionography

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    LOL well with the way amd marketing is going on the cpu side then expect something along the likes of
    TENIRIFE ELITE COMPUTE AND GRAPHICS
    HAINAN NO COMPROMISE PERFORMANCE
    BONAIRE GAMER PRO

    especialy with hd9000 being the last gen with hdxxxx marketing unless they go OVER 9000
     
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  7. The Von Matrices

    The Von Matrices

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    I do not understood the reasoning to create new cards to fill minor price gaps like this one, especially since this price gap has existed for nearly a year already. Is there really a horde of people waiting to buy a card whose only defining characteristic is that it's more powerful than a 7770 but less than a 7850? I would think that they already either bought a 7770 or saved their money for a little while longer and got a 7850. If the 7790 used less power than either of the currently available cards or had other unique features (e.g. new video formats for hardware decoding, additional display outputs), then I could see its purpose, but I fail to see why anyone would have waited to buy this card over any of the already available alternatives.
     
  8. sergionography

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    its rated tdp is at 85w which is below hd7770 which is 100w
    and about the same as hd7750
    and does 2prim/clock similar to tahiti configuration
    so while pitcairn and cape verde had more gaming efficient cores because they didnt have the compute muscle activated, this has that and is more efficient than both cape verde and pitcairn and tahiti offcourse
    in other words it is an enhancement to the gcn architecture


    edit: also hd 7850 is rated at 1.76gflops, so this tops it off with half the tdp
    so performance should be something we are familiar with, but if you read between the lines its very much a next gen part
     
    Last edited: Mar 21, 2013
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  9. Xzibit

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    Its bugging me :p

    7770 = 80W
    7750 = 55W
     
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  10. HammerON

    HammerON The Watchful Moderator Staff Member

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    These look like they will be nice crunchers (Boinc):toast:
     
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  11. hardcore_gamer

    hardcore_gamer

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    The computing performance of 1.79 TFLOPS is very close the performance of the PS4 GPU (1.84TFLOPS). This card is also very efficient compared to the current gen cards. I think AMD made a small modification to it's next gen console GPU to create this card.
     
  12. Xzibit

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    These were already in the pipeline and probably desingned in parallel with the PS4 APU.


    AMD to adopt 28nm Bulk CMOS manufacturing process for products in 2013
     
  13. sergionography

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    thanks for the correction you are right i just checked a few reviews
    though I could swear i googled the stuff right before i wrote my first comment and now i cant even remember were i got the 100w from lol
    DARN THE INTERWEBZ!

    edit: wait wait I found it
    http://www.anandtech.com/show/5541/amd-radeon-hd-7750-radeon-hd-7770-ghz-edition-review

    100w is the powertune limit


    but the ps4 has 18 gcn compute units which total 1152cores, but they are rated at the same flops because they are clocked lower to get better performance/watt which allows tdp room for the cpus, so whatever it is im sure its an engineering decision that was well thought out of

    ive heard rumors that the xbox was using a chip with 896gcn cores, so im suspicious about this being a xbox next chip rather than a ps4, also with the success of xbox 360 i dont know if microsoft would go the way of sony and do x86 and pretty much kill backwards compatibility. so if they use a powerpc cpu on a seperate chip this could be the gpu on board
     
    Last edited: Mar 21, 2013
  14. Norton

    Norton WCG-TPU Team Captain

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    +1 ....very interested in their crunching capability :toast:
     
    Crunching for Team TPU More than 25k PPD
  15. Prima.Vera

    Prima.Vera

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    I am thinking the same thing....:ohwell:
     
  16. The Quim Reaper

    The Quim Reaper

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    I do believe we're looking at the PC version of the next Xbox GPU with this new card.

    Or rather, it's actual level of performance, if not exactly the same silicon design.

    1.79 vs 1.84, it's too close to be a coincidence.

    ..and here in the UK, Overclockers, AMD's biggest UK retail partner, are currently trying to clear out stock of their 7770 range by reducing them to £99.99 (from £120), so no prizes for guessing these new cards will be occupying that price point.
     
  17. Ronnyv1

    Ronnyv1

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    I live way deep in south america so shipping a 180$ 7850 is way more expensive than shipping a cheaper 7750/7770 and if this thing does 1080p decently like the 7850 then its aimed at me :3
     
  18. fynxer New Member

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    Hmmm, how could you have missed the news about 7790. It's been on all news sites for well over a month that a release was scheduled for end of march.

    In what time frame is "just bought", a week ago or 6 months ago.

    If you bought your 7770 a few months ago then it's nothing to cry about, sell your 7770 quick and do a small loss now and get an nice upgrade i the process.

    Read tomorrows reviews and check what AMD card give most bang for your buck. For example, some 78xx cards sell very cheap at the moment...
     
  19. Delta6326

    Delta6326

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    I'm gonna take a guesstimate and say it will be about 5% slower than a 7850. if this was to be the xbox gpu I wonder how Ports will be on it.
     
  20. DarkOCean

    DarkOCean

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    It will be slower than that 7790 has 40% less bandwidth and only 16 rops while 7850 has alot more oc potential having only 860mhz base core clock and alot of bandwidth.
    Even the preliminary tests(only 3dmarks) from sweclockers showed a factory overclocked 7790 (1075/6400 vs 1000/6000) being ~10% slower than a stock clocked 7850... bottom line i'm expecting stock clocked cards to be ~15% slower than stock 7850's (about stock gtx560ti performance).
     
    Last edited: Mar 21, 2013
  21. Xzibit

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    I need to see more to get excited...

    Whats is impressive if true is the quick turn-around if its GCN 2.0.

    I'm more interested to know if its Bonaire Pro or XT. That will set the stage for what we can expect for the rest of the line-up.


    :)

    The information (specs) on those leaks still dont match up..

    Here are the benchmarks I asume your were refering to.

    [​IMG]

    [​IMG]

    If the 7790 follows how GCN is in OC. 1075 is just a AIB icing to intise customers. Even if base is at 1000. Reference you'll probably get to 1140 before it needs outside adjustment other then those provided by AMD OverDrive.
     
    Last edited: Mar 21, 2013
  22. [XC] Oj101

    [XC] Oj101

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    The card will feature 1 GB of memory.

    [​IMG]

    ;)
     
  23. Ronnyv1

    Ronnyv1

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