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. Entropy

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    HBM should represent quite a significant saving in power draw, compared to 512-bits worth of GDDR5.
     
  2. Silent_Buddha

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    Does anyone know the power consumption of HBM? We already know that GDDR is relatively power hungry. So if they are using HBM and it uses less power than GDDR (either inherently or via less complex board design/traces), that could also provide some theoretical power savings.

    As well, like silent_guy said, there's no reason that AMD wouldn't be able to eek out some more power savings from the chip itself similar to Nvidia. After all, IF there's any truth to those graphs, the power/perf ratio is pretty similar to GTX 980.

    But yeah, BIG IFs and large piles of salt WRT whether there's any validity to those graphs.

    Regards,
    SB
     
  3. psurge

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    Would that tell us very much though? You'd also need to factor in the power consumption of the (presumably different) on-die memory controllers. FWIW (not much IMO), the hynix graphics memory webpage at https://www.skhynix.com/gl/products/graphics/graphics_info.jsp makes very vague claims of 65% system performance improvement (what system? what workload?) for 40% less memory power consumption than GDDR5.
     
  4. Grall

    Grall Invisible Member
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    Logic dictate it has to be very low, due to it being a stack of dies. You can't cool the lowest and intermediate dies directly, which means they must not dissipate very much power, or the stack would either kill itself or become unreliable.
     
  5. Alexko

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    I think Hynix once said it draws about 50% less power than GDDR5 for twice the bandwidth or something like that. For what it's worth, the R9 290X has a TDP of 294W (I think, or very close) and the Hawaii GPU itself is limited to 208W, which leaves some 86W for everything else, including the memory.

    But I suppose HBM might also allow for power savings on the GPU itself, e.g. the memory PHYs.
     
  6. lanek

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    AMD will manufacture GPU's at Global Fundries:

    Source AMD via Guru3D

    In our previous post about 16nm TCSM we've been wondering as to why AMD was not on the 16nm fab list, whereas other players like Nvidia have been named. The answer just came to us though, AMD will manufacture their GPU at Global Foundries. Global Foundries has made great progress claims Devinder Kumar from AMD at an investor meeting.


    AMD sold Global Foundries in 2008 to raise cash in difficult times, Kumar stated that they will still fab 'some' products at 20nm and from there on-wards it will move to Finfet-chips. Gobalfoundries is working together with Samsung on 14nm already, Samsung will launch with SoCs based on that fab node next year already.


    Finfets have a bigger surface area which helps switching faster for the transistors. Finfet chips are more power efficient, smaller and cheaper to manufacture.


    It's unclear of AMD will remain partner of TSMC.
     
  7. Newguy

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    fab "some" products at 20nm. Possible hint at 20nm APU/28nm GPU?
     
  8. Grall

    Grall Invisible Member
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    Console APUs perhaps, since these are already being made by TSMC?
     
  9. pMax

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    imho, from a marketing perspective, it would make sense a tiffany GPU to get ahead of new NVIDIA, and use the rest for console APU where they can likely squeeze more margins that way.
     
  10. Blazkowicz

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    tiffany is a really cute word or female first name but I don't understand the cultural meaning or reference.

    AMD already has the experience of translating a product from TSMC to GloFo, they did that with Kabini (AM1 socket versions)
     
  11. Kaotik

    Kaotik Drunk Member
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    What Guru3D forgot to mention is that Kumar said in the said transcript that they're already making GPUs at GloFo and that they intend to continue on that road.
    The impression I got is that 20nm GPUs are a possiblity, 14nm FinFET GPUs are for sure
     
  12. Esrever

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    Glofo doesn't have a 20nm node as far as I know. I wonder if they are currently switching from TSMC 28nm to Glofo 28nm for gpus. Kind of unlikely given how all sources say Tonga is at TSMC.
     
  13. Alexko

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  14. Kaotik

    Kaotik Drunk Member
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  15. Alexko

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    Someone from Muropaketti?

    Anyway, I figured as much. Carrizo is known to be on 28nm, ditto for Carizo-L (which seems to be a renamed Beema) and there are persistent rumors that AMD is skipping 20nm for discrete GPUs. That only leaves ARM stuff.

    Edit: Oh, and the x86 variant of Skybridge, if that's still happening.
     
    #2815 Alexko, Dec 5, 2014
    Last edited: Dec 5, 2014
  16. Kaotik

    Kaotik Drunk Member
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    Doesn't work with us at Muropaketti, but posts at our forums among others, maybe here too, not sure (The Stilt)
     
  17. Pete

    Pete Moderate Nuisance
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    Tiffanys is a boutique jewelry store in New York City. The implication is exclusive and expensive.
     
  18. ToTTenTranz

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    Until I went to NY last year, I thought Tiffany's was a caffé.
    You know, some place where you'd have breakfast ;)
     
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  19. Babel-17

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    It's the Cadillac of jewelry stores. :)
     
  20. Pete

    Pete Moderate Nuisance
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    It's the Bugatti of Cadillacs! ;)
     
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