1. Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

AMD Pitcairn Specifications Surface

Discussion in 'News' started by btarunr, Feb 20, 2012.

  1. btarunr

    btarunr Editor & Senior Moderator Staff Member

    Joined:
    Oct 9, 2007
    Messages:
    29,459 (10.80/day)
    Thanks Received:
    14,010
    Location:
    Hyderabad, India
    The launch of AMD's Radeon 7800 series is on course for March, as AMD wants to complete the launches of the entire Radeon 7000 series before NVIDIA even has its first GPU out. Radeon HD 7800 will be designed to occupy key price points in the sub-$300 market segment, where it strikes price-performance sweetspots for gamers. Central to this series is a new 28 nm GPU, codenamed "Pitcairn", from which will be derived three SKUs: the Radeon HD 7870, Radeon HD 7850 2 GB, and Radeon HD 7850 1 GB. The specifications look like this:

    Radeon HD 7850
    • 20 Graphics CoreNext Compute Units, 1280 stream processors
    • 80 TMUs, 24 ROPs (de-linked from the memory bus, of course)
    • 256-bit wide GDDR5 memory interface, 2 GB and 1 GB variants
    • Clock speeds of 900 MHz core, 1250 MHz (5.00 GHz effective) memory
    Radeon HD 7870 specifications follow.

    Radeon HD 7870
    • 22 GCN CUs, 1408 stream processors
    • 88 TMUs, 24 ROPs (de-linked from memory bus)
    • 256-bit wide GDDR5 memory interface, 2 GB
    • Clock speeds of 950 MHz core, 1375 MHz (5.50 GHz effective) memory
    Some time after March, AMD will likely launch a "Radeon HD 7890" SKU, which will be based on the Tahiti GPU.

    Source: Expreview
     
    damric, Horrux, Goodman and 2 others say thanks.
  2. Super XP

    Super XP

    Joined:
    Mar 23, 2005
    Messages:
    2,807 (0.77/day)
    Thanks Received:
    549
    Location:
    Ancient Greece, Acropolis
    Seems they are trying to corner the market big time. What purpose would the Radeon HD 7890 have? We've already had the HD 4890 which was the last GPU released shortly before Evergreen's HD 5000 series.
     
  3. ViperXTR

    ViperXTR

    Joined:
    Jan 31, 2011
    Messages:
    1,400 (0.92/day)
    Thanks Received:
    409
    these are supposed to be the replacement of HD 6800 yes? (the supposed to be midrange parts), HD 7700 being the mainstream and the HD 7900 series high end.
     
  4. Daimus

    Daimus

    Joined:
    Sep 20, 2011
    Messages:
    527 (0.41/day)
    Thanks Received:
    474
    Location:
    somewhere in Eastern Europe
    It looks like 7870 will replace 6970 and 7850 replace the 6950. The new architecture will maintain the performance of previous generations with fewer shader units.
     
  5. btarunr

    btarunr Editor & Senior Moderator Staff Member

    Joined:
    Oct 9, 2007
    Messages:
    29,459 (10.80/day)
    Thanks Received:
    14,010
    Location:
    Hyderabad, India
    At this moment it looks like just a contingency plan in case competition heats up. I don't think we'll see that SKU any time soon.
     
  6. dieterd New Member

    Joined:
    Feb 24, 2011
    Messages:
    120 (0.08/day)
    Thanks Received:
    2
    it will be the same story no matter what it is called 79xx or 77xx - price/preformance will suck bad vs HD 69xx.
     
  7. Crap Daddy

    Crap Daddy

    Joined:
    Oct 29, 2010
    Messages:
    2,784 (1.73/day)
    Thanks Received:
    1,079
    At best this will be the outcome. Same price probably for the same performance as last generation.
     
  8. Shinshin

    Joined:
    Sep 20, 2010
    Messages:
    79 (0.05/day)
    Thanks Received:
    10
    I'm afraid this is true...
    No bang for the buck in this generation of AMD...
     
  9. Dj-ElectriC

    Dj-ElectriC

    Joined:
    Aug 13, 2010
    Messages:
    2,310 (1.37/day)
    Thanks Received:
    865
    If this kind of news find it's way to techpowerup it only means that w1zz has approved with he's samples.
     
  10. Daimus

    Daimus

    Joined:
    Sep 20, 2011
    Messages:
    527 (0.41/day)
    Thanks Received:
    474
    Location:
    somewhere in Eastern Europe
    Let's hope that with the release of Kepler prices will fall.
     
  11. crazyeyesreaper

    crazyeyesreaper Chief Broken Rig

    Joined:
    Mar 25, 2009
    Messages:
    8,219 (3.75/day)
    Thanks Received:
    2,856
    Location:
    04578
    makes perfect sense

    Juniper was half of Cypress

    cape verde is half of Pitcairn

    makes perfect sense,

    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


    7770 to 7850

    640 shaders to 1280 shaders
    1GB to 2GB
    40 TMUs to 80 TMUs
    16 ROPs to 24 ROPs

    7770 to 7870
    640 shaders to 1408
    1GB to 2GB
    40 TMUs to 88 TMUs
    16 ROPs to 24Rops

    if you look at the 7970

    7770 to 7970
    640 to 2048
    1GB to 3GB
    40 TMUs to 128TMUs
    16 ROPs to 32 ROPs

    depending on which card in the series you look at

    essentially Cape Verde is Doubled or Tripled to meet the next performance bracket neccesary,

    and we can already see the performance 7800 series offers just look at 7770 crossfire, same situation as 5770 crossfire was to 5870 essentially, it makes sense considering AMDs idea to design a middle of the road gpu they can scale up and down to meet market demands

    AMD as doubled and tripled shader counts from CapeVerde to each segment
    ROPs get increased by 8

    so we have 640 shaders 16 rops 40 tmus
    next step up 1280 24 80
    next step above that 1920 32 120, gives a rough idea of what AMDs idea was with GCN
    7770 = entry 7770 xfire = 7870 and 7970 is of course 7970

    Notice the Performance jump 40% then 30% roughly what we should expect when the value of diminishing returns are taken into account,
    [​IMG]
     
  12. resident10 New Member

    Joined:
    Feb 20, 2012
    Messages:
    4 (0.00/day)
    Thanks Received:
    0
    I wonder in what program can I make so beautiful diagram or graph like in the post above (by crazyeyesreaper).
     
  13. Yellow&Nerdy?

    Yellow&Nerdy?

    Joined:
    Oct 7, 2009
    Messages:
    394 (0.20/day)
    Thanks Received:
    57
    These will probably be the cards I'm most likely to get. Again, there probably won't be anything wrong with the cards themselves, let's just hope AMD can figure out how to price them properly and not pull off what they did with Cape Verde.
     
  14. HossHuge

    HossHuge

    Joined:
    Jun 26, 2008
    Messages:
    2,127 (0.86/day)
    Thanks Received:
    572
    Location:
    EDM, AB, CAN
    :wtf:
     
  15. btarunr

    btarunr Editor & Senior Moderator Staff Member

    Joined:
    Oct 9, 2007
    Messages:
    29,459 (10.80/day)
    Thanks Received:
    14,010
    Location:
    Hyderabad, India
    MS Paint.
     
  16. resident10 New Member

    Joined:
    Feb 20, 2012
    Messages:
    4 (0.00/day)
    Thanks Received:
    0
  17. resident10 New Member

    Joined:
    Feb 20, 2012
    Messages:
    4 (0.00/day)
    Thanks Received:
    0
    I'm serious. Every tech blog has beautiful bars (or charts) in articles and reviews. I'm sure these pictures are generated automatically, but the key question - what software was used.
     
  18. btarunr

    btarunr Editor & Senior Moderator Staff Member

    Joined:
    Oct 9, 2007
    Messages:
    29,459 (10.80/day)
    Thanks Received:
    14,010
    Location:
    Hyderabad, India
    We made our own software that makes those graphs. Trade secret.
     
  19. resident10 New Member

    Joined:
    Feb 20, 2012
    Messages:
    4 (0.00/day)
    Thanks Received:
    0
    Oh, I understand ;)
    Thanks a lot
     
  20. brandonwh64

    brandonwh64 Addicted to Bacon and StarCrunches!!!

    Joined:
    Sep 6, 2009
    Messages:
    18,886 (9.31/day)
    Thanks Received:
    6,372
    Location:
    Chatsworth, GA
    He is serious LOL
     
    Crunching for Team TPU
  21. DarkOCean

    DarkOCean

    Joined:
    Jan 28, 2009
    Messages:
    1,641 (0.73/day)
    Thanks Received:
    365
    Location:
    on top of that big mountain on mars(Romania)
    and the price for the 7870 is ...$320 or $350? seing how 7770 is priced.
     
  22. HossHuge

    HossHuge

    Joined:
    Jun 26, 2008
    Messages:
    2,127 (0.86/day)
    Thanks Received:
    572
    Location:
    EDM, AB, CAN
  23. btarunr

    btarunr Editor & Senior Moderator Staff Member

    Joined:
    Oct 9, 2007
    Messages:
    29,459 (10.80/day)
    Thanks Received:
    14,010
    Location:
    Hyderabad, India
    If HD 7870 outperforms GTX 570, then AMD might troll us with $349. If it doesn't outperform GTX 570, then $299.

    A beautiful set of islands.
     
  24. Crap Daddy

    Crap Daddy

    Joined:
    Oct 29, 2010
    Messages:
    2,784 (1.73/day)
    Thanks Received:
    1,079
    I think it will not outperform a GTX570 and it will be 350$. But hey, you can overclock like hell, draws far less power etc. etc.
     
  25. stupido

    Joined:
    Sep 23, 2009
    Messages:
    151 (0.08/day)
    Thanks Received:
    21
    Location:
    Belgium
    meh... not trolling exactly.. just "healthy greed" so typically seen... :D if they can of course (I think there are enough fanbois out in the wilderness to be hunted) :nutkick:
     

Currently Active Users Viewing This Thread: 1 (0 members and 1 guest)

Share This Page