AMD: Volcanic Islands R1100/1200 (8***/9*** series) Speculation/ Rumour Thread

Discussion in 'Architecture and Products' started by Nemo, May 7, 2013.

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  1. AnarchX

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    XTL also introduces a temperature dependent clock-rate on Tahiti:
    http://ht4u.net/reviews/2013/amds_r...270x_und_280x_und_r7_260x_im_test/index19.php
    With 80°C in Furmark the card lowers clock to 501MHz. After a while it cools down to 78°C and starts again to boost (900-1050MHz).
     
  2. elect

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    If you know that something new is going out and hopefully making prices fall, you mostly would like to wait before buying anything
     
  3. Gipsel

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    Could be just a side effect of the botched cooling of the MSI card, i.e. a safety measure. I doubt the GPU is planned to downclock that low in normal operation, even with Furmark.
     
  4. Mintmaster

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    There's no such thing as "need" and "doesn't need" when it comes to BW. Almost all games will present some fraction of the rendering workload that will be memory bandwidth limited, and that fraction will be sped up by faster memory. GK110 and GK104 left performance on the table by not more BW, but of course BW isn't free either.

    You're right about this being a good way to evaluate bandwidth needs of games, but you're wrong in saying that there isn't much difference. Take a look at the performance difference between the stock 670 and stock 660 Ti:
    http://www.anandtech.com/show/6159/the-geforce-gtx-660-ti-review
    There's a pretty substantial gap in all games except Portal 2.

    Note that if the 670 is 10% faster, it is BW/ROP limited ~30% of the time. For example, if game's rendering time averaged 20ms (50 fps) on the 670, and 6ms was BW or ROP limited, then the latter workload would take 8ms on the 660 Ti, and thus take 22ms (45.5 fps) to render, making the 670 10% faster.

    In Anand's review, several games exceeded a 10% drop. Batman looks like it's 75% BW limited.
     
  5. Skinner

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    It's the same story over and over with AMD and new toy's, "not in stock". Here in the Netherlands there where a handfull, but now empty shelves like it use to be, same goes for Germany. The UK has an handfull, nothing more...
     
  6. Dave Baumann

    Dave Baumann Gamerscore Wh...
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    Sorry?

    The MSi card was known to be have issue and MSI are developing a new PCB revision.
     
  7. Tridam

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  8. ToTTenTranz

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    Not everyone plays the waiting game right. In fact, I wonder if many people do it at all.


    There's a factor of balance, just as in everything else. At a certain level of IQ/resolution, increasing memory bandwidth may result in residual improvements or no improvement at all. If I want to play game X at 1080p with GPU Y there can be situations where I don't need the version with higher memory bandwidth.



    For starters, do they even sell non-"overclocked" GTX 660 Ti cards these days? The approximation to the GTX670 was made from day one because AFAIK most 660 Ti being sold are factory overclocked.


    Anyways, for 1200p (because 1080p+1200p should be the overwhelming majority for gamers today) and all games maxed out:
    Crysis Warhead: 20% difference
    Metro 2033: 13% difference
    Dirt 3: 11% difference
    Shogun 2: 6% difference
    Arkham City: 19% difference
    Portal 2: 2% difference
    BF3: 16% difference
    Skyrim: 8% difference
    Civ V: 10% difference

    For 25% more ROPs and memory bandwidth, only 3 of those games show a substantial difference.
    Regardless, all these games are playing at over 50/60FPS so there isn't much difference. In some of them, there's no difference at all..

    Another good example are the GTX 770 vs. GTX 680 reviews. Despite the ~14% memory bandwidth advantage (and marginally higher clocks), you won't see more than a 5% bump in performance, if at all.


    What?!?





    Whatever.. the point was - and still is - higher memory bandwidth for the R9 290X may not be needed at all. Not for that card or even its successor.
    Taking a look at the 290X with overclock shows exactly what I'm saying.

    290X with 5GT/s memory, 320GB/s:
    [​IMG]

    290X with memory overclocked to 6.2GT/s, 397GB/s:
    [​IMG]



    Performance boost for 20% higher memory bandwidth is 0,004%.
    Yeah, totally worth it...
     
    #1688 ToTTenTranz, Oct 29, 2013
    Last edited by a moderator: Oct 29, 2013
  9. silent_guy

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    If you going from 75 BW to 100 BW (+33%) results in going from 100 perf to 133 perf, then you can conclude that, 100% of the time, your BW was the bottleneck that was limiting perf. Similarly, if the perf only went up from 100 to 110, the BW was the bottleneck ~30% of the time.
     
  10. 3dcgi

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    Don't use 3dmark to determine how bandwidth constrained a chip is. Use Battlefield 3 or Crysis 3.
     
  11. jaredpace

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    Anyone know codenames 'Saturn' & 'Sun' to go along with Bonaire & Hawaii in Volcanic Islands?
     
  12. AnarchX

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    Sun = mobile Hainan
    Saturn = mobile Bonaire

    It also should be measured, if BW increases or error correction is in work and lowers the actually BW.
     
  13. Silent_Buddha

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    You would think by now that people would understand that a product being sold out shortly after launch only means that demand greatly outpaces supply.

    It does NOT say anything about how many cards were released, even remotely.

    If 100,000 customers of X shop wanted Y product at launch...

    1. With 100 of Y product allocated to X shop, they would be sold out.
    2. With 1,000 of Y product allocated to X shop, they would be sold out.
    3. With 10,000 of Y product allocated to X shop, they would be sold out.
    4. Etc.

    Heck, if 10 million people worldwide wanted to buy X product, it would be sold out whether 10,000 of X product was released or 1 million of X product was released.

    So, just like with the launch of 5870, 6970, 7970 for AMD and 580, 680 for Nvidia, being sold out for weeks/months after launch doesn't say one single bit about how many video cards were actually supplied. The only thing it says is that more people wanted one than AMD or Nvidia could produce for those first weeks/months.

    Regards,
    SB
     
  14. Mintmaster

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    Really? Then why bother increasing performance at all? Or do you have some way of telling the difference between 10% difference from BW and 10% difference from the GPU?
    Irrelevant. They sell overclocked 670's, too.
    You're not very good at counting.
    Any reason why you snipped out the part where I meticulously explained the mathematics behind that?
    3DMark is not a game.
     
  15. Blazkowicz

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    On a side note I've finally managed to not confuse Hainan and Hawaii. Those names were really close.
     
  16. Dave Baumann

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  17. moozoo

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    Once the 290 is released, I'd expect demand for the 290X to drop and for them to be available again.
     
  18. homerdog

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    That's pretty typical isn't it? When the GTX670 came out it almost defeated the purpose of the GTX680. Even more so with the GTX780 vs Titan.

    The real sweet spot right now is in the ~$210 range, where I scored an HD7950 Boost with 3 friggin awesome games at regular price on Newegg few weeks ago. The prices have gone up some since then, but if you shop around you can still get close to that.

    Get'm while they're hot!
     
    #1698 homerdog, Oct 30, 2013
    Last edited by a moderator: Oct 30, 2013
  19. Bouncing Zabaglione Bros.

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    Got a R9-290 or R9-290X that you want to put in your water loop? Have you seen these beauties?


    [​IMG][​IMG]
     
  20. SimBy

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    That is just beautiful.
     
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