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AMD Radeon HD 7800 Series Specs Revealed in Leak

By - Source: EXPreview | B 51 comments

With the launch of both the HD 7900 and HD 7700 series, AMD is expected to release its HD 7800 series GPUs in March. Today, we get our first peek at the specifications of the HD 7850 and HD 7870.

As reported first of February in a leaked roadmap, AMD is set to release its HD 7800 series graphics cards based on Pitcairn in March. Based on information coming out of Chinese-based EXPreview.com, we may have our first glimpse at the specifications for the new Pitcairn series. The HD 7800 series will utilize AMD's GCN stream processors seen with both HD 7900 and HD 7700 series.

Radeon HD 7850

  • 20 Graphics CoreNext Compute Units
  • 1280 stream processors
  • 80 TMUs
  • 24 ROPs
  • Memory Bus of 256-bit
  • Memory size of 1 GB/2GB GDDR5 memory
  • Clock speeds of 900 MHz core
  • Memory frequency of 1250 MHz (5.00 GHz effective)

 

Radeon HD 7870

  • 22 Graphics CoreNext Compute Units
  • 1408 stream processors
  • 88 TMUs
  • 24 ROPs
  • Memory bus of 256-bit
  • Memory size of 2GB GDDR5 memory
  • Clock speeds of 950 MHz core
  • Memory frequency of 1375 MHz (5.50 GHz effective)

  

Early pricing for the HD 7850 has it listed at around $220 dollars and the HD 7870 around $300 dollars. In the second quarter, AMD is expected to release both the HD 7990 and HD 7890. While the specs for HD 7990 are still relatively unknown, the HD 7890 will be based on Tahiti (same as the HD 7900 series). It is expected to feature 24 Graphics CoreNext Compute Units, 1536 stream processors, 96 TMUs, 32 ROPs, and have a 1.5 GB memory with memory interface of 384-bit. Early expectations for pricing has the price of the HD 7890 around $359 dollars.

Please keep in mind, of course, that these specifications are from EXPreview's supposedly reliable source. We won't know for sure until AMD shows its hand. Stay tuned!

Discuss
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Top Comments
  • 19 Hide
    ikefu , February 22, 2012 12:29 PM
    I don't think Physx is the selling point it once was. Its a very specific library that was useful when general GPU Compute architectures were unavailable. But now that AMD is jumping in whole hog with GCN to match NVIDIA, I foresee physics based computations moving away from Physx to use general GPU compute libraries. General GPU compute is the best path because it will support the greatest number of cards and therefore the most customers as well.

    Its only a matter of time before Physx dies in favor of general GPU computer libraries.
  • 13 Hide
    OSU Cowboy , February 22, 2012 11:54 AM
    Was in the process of picking up a 6850...actually had it ordered but cancelled in the hopes I can hold off and grab a 7850. Everyone agree that it would be worth the wait?
  • 11 Hide
    jrharbort , February 22, 2012 9:18 AM
    This is really excellent pricing if the rumors are true, since these cards will be very similar to the 6950 and 6970 in performance (ATI has been a bit modest with their transition charts from what I've seen). Those cards can be found for around $240 and $350 respectively. Oh, and don't don't forget about the much lower power usage and thermals. ;) 

    The 28nm gen is certainly shaping up to be an interesting one.
Other Comments
  • 10 Hide
    viridiancrystal , February 22, 2012 9:18 AM
    Hoping for very low power cards here, and a nice boost over the 6800's
  • 11 Hide
    jrharbort , February 22, 2012 9:18 AM
    This is really excellent pricing if the rumors are true, since these cards will be very similar to the 6950 and 6970 in performance (ATI has been a bit modest with their transition charts from what I've seen). Those cards can be found for around $240 and $350 respectively. Oh, and don't don't forget about the much lower power usage and thermals. ;) 

    The 28nm gen is certainly shaping up to be an interesting one.
  • 10 Hide
    esrever , February 22, 2012 9:20 AM
    Can't wait for the reviews!
  • 4 Hide
    __-_-_-__ , February 22, 2012 9:30 AM
    7850 2Gb will definitely be my next gxf.
  • 11 Hide
    tomfreak , February 22, 2012 9:52 AM
    Where is the realistic leak of Kepler when u NEED IT.
  • -7 Hide
    neiroatopelcc , February 22, 2012 9:53 AM
    I find this news piece is written in an odd variation of english. It's not misspelled like Kevin's usual stuff, but it sort of sounds like a google translate or something.
  • 1 Hide
    confish21 , February 22, 2012 10:18 AM
    Ok, Ive been waiting to bring this up... Anyone else use google translate to check out expreview.
  • 1 Hide
    pixelpojken , February 22, 2012 10:30 AM
    So, any guestimations on the relative perforcmance of 7890 vs 7950? I'd appreciate an opinion.
  • 3 Hide
    neiroatopelcc , February 22, 2012 10:43 AM
    confish21Ok, Ive been waiting to bring this up... Anyone else use google translate to check out expreview.

    I've stopped using it at all. The other day I wanted to translate a cake from danish to german. The end product according to google was 'green poison kuchen' - so only a third of the words were even german at the end of the day.
  • 13 Hide
    OSU Cowboy , February 22, 2012 11:54 AM
    Was in the process of picking up a 6850...actually had it ordered but cancelled in the hopes I can hold off and grab a 7850. Everyone agree that it would be worth the wait?
  • 19 Hide
    ikefu , February 22, 2012 12:29 PM
    I don't think Physx is the selling point it once was. Its a very specific library that was useful when general GPU Compute architectures were unavailable. But now that AMD is jumping in whole hog with GCN to match NVIDIA, I foresee physics based computations moving away from Physx to use general GPU compute libraries. General GPU compute is the best path because it will support the greatest number of cards and therefore the most customers as well.

    Its only a matter of time before Physx dies in favor of general GPU computer libraries.
  • 5 Hide
    jahrasta311 , February 22, 2012 12:44 PM
    DeViLzzz2007I can't wait to see what Nvidia offers in the future. Can you say Physx ? I want a card with that and so ATI I pass on what you are offering.

    Physx.
  • 1 Hide
    nforce4max , February 22, 2012 12:47 PM
    Good finally a card that I have been eagerly waiting for that being the 7850. It is right where my price point is and hopefully the card is short.
  • 0 Hide
    staywan , February 22, 2012 12:59 PM
    Anyone know how the 7850 will compare to the 560ti at that price?
    You can get a 560ti for around $200 now.
  • 10 Hide
    wolfram23 , February 22, 2012 1:28 PM
    Quote:
    Performance wise 7870 will fall somewhere between 6950-6970 closer to 6950. It will not surpass 6970 at all that is where 6890 will take the place to fill the gap between 1792 and 1408 SPs and to replace 6970
    The average performance difference between 7970 and 7950 is about ~15% and 7950 has ~12.5% less SPs...likewise 7870 has 31.2% less SPs than 7970 so one should expect performance somewhere in this range 31-37.5% less...Anyway 6950 has about 31% less SPs than 7970 and performance wise it is on average 35% slower. So let's look at the 6950 and 7870, same number of SPs, ROP'S, and TMUs. So we are looking at performance somewhere between 31-35% less than 7970 or 0-4% better than 6950.
    The price you pay for 1SPs for 7850 at $220 is $0.171
    The price you pay for 1SPs for 6950 at $250 is $0.177
    The price you pay for 1SPs for 6970 at $300 is $0.195
    The price you pay for 1SPs for 7870 at $300 is $0.213
    The price you pay for 1SPs for 7950 at $450 is $0.257
    The price you pay for 1SPs for 7970 at $550 is $0.268


    Ridiculous comparison. 7000 SPs do a lot more than 6000 series, plus there's other factors like the 7900 having a bigger bus.

    Wait till the reviews are out, at least, and then look at price/performance not price/SPs.
  • -7 Hide
    ismaeljrp , February 22, 2012 1:43 PM
    maxinexusPerformance wise 7870 will fall somewhere between 6950-6970 closer to 6950. It will not surpass 6970 at all that is where 6890 will take the place to fill the gap between 1792 and 1408 SPs and to replace 6970 The average performance difference between 7970 and 7950 is about ~15% and 7950 has ~12.5% less SPs...likewise 7870 has 31.2% less SPs than 7970 so one should expect performance somewhere in this range 31-37.5% less...Anyway 6950 has about 31% less SPs than 7970 and performance wise it is on average 35% slower. So let's look at the 6950 and 7870, same number of SPs, ROP'S, and TMUs. So we are looking at performance somewhere between 31-35% less than 7970 or 0-4% better than 6950.The price you pay for 1SPs for 7850 at $220 is $0.171The price you pay for 1SPs for 6950 at $250 is $0.177The price you pay for 1SPs for 6970 at $300 is $0.195The price you pay for 1SPs for 7870 at $300 is $0.213The price you pay for 1SPs for 7950 at $450 is $0.257The price you pay for 1SPs for 7970 at $550 is $0.268


    Yep, I was about to write a similar comment. That's pretty much what they are doing I'll make it simpler.

    6870
  • 2 Hide
    robojin , February 22, 2012 1:48 PM
    I want to switch to amd but i'm stuck with Nvidia because i need the PhysX for my job.
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