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Old February 20, 2012, 09:33 AM
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Default AMD's Pitcairn GPU detailed (78xx series)(update)

As per posted on fud:
AMD's upcoming Pitcairn GPU detailed

"AMD is planning to launch its mid-range HD 7800 series cards based on the Pitcairn GPU sometime in March, or according to our sources, the first week of March. There will surely be a card or two at this year's Cebit show that kicks off on March 6. Expreview managed to score some details regarding the Pitcairn cards and it appears that we are looking at three different SKUs, the Radeon HD 7870, and two Radeon HD 7850 cards with either 1 or 2GB of memory.

The specifications of the fully enabled Pitcain based HD 7870 include 22 Graphics CoreNext compute units, or simply 1408 stream processors, 88 TMUs and 24 ROPs. The Radeon HD 7870 will ship with 2GB of GDDR5 memory paired up with a 256-bit memory interface. The HD 7870, at least the reference ones, should be set to work at 950MHz for the GPU and 1375MHz (5.5GHz effective) for memory.

The Radeon HD 7850 on the other hand has two GCN CUs less, for a total of 1280 stream processors, 80 TMUs and 24 ROPs. This one will be available with either 1 or 2GB of GDDR5 memory paired up with the same 256-bit memory interface. The HD 7850 should end up clocked at 900MHz for the GPU and 1250MHz (5.0GHz effective) for the memory."

Last edited by terrybear; February 21, 2012 at 09:20 AM.
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Old February 21, 2012, 09:22 AM
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According to the new leaked info from here:
AMD Radeon HD7800 "Pitcairn XT/Pro" Specifications Leaked

" The Pitcairn XT which features 1408 stream processors, 88 texture units and 24 ROPís, A 2GB GDDR5 memory (256-bit). The Core clock is maintained at 950Mhz and 5500Mhz for the memory. The HD7870 would retail for $299.
AMD Radeon HD 7870
  • 1408 Stream Processors
  • Code Name: Pitcairn XT
  • 2GB Memory Buffer
  • Release Date: March 2012
  • Price: 299 $
Its little brother, Pitcairn Pro based HD7850 would also launch the same day for a price of $249. This variant would feature 1280 stream processors, 80 texture units and 24 ROPís, A 2GB memory buffer (256-bit GDDR5). The card would run at 900Mhz/5000Mhz for Core and Memory respectively. A 1Gb version of the card would also be available for $219, Specs would remain the same.
AMD Radeon HD 7850
  • 1280 Stream Processors
  • Code Name: Pitcairn Pro
  • 2GB Frame Buffer
  • Release Date: February 2012
  • Price: 249 $
AMD Radeon HD 7850
  • 1280 Stream Processors
  • Code Name: Pitcairn Pro
  • 1GB Frame Buffer
  • Release Date: February 2012
  • Price: 219 $
Another SKU, HD7890 which is based on the Tahiti LE core is expected to launch in Q2 2012, The GPU would feature the Tahiti Die instead of the Pitcairn and pack 1536 Stream Processors, 96 Texture Units, 32 ROPs. A 1.5GB memory buffer with 384-bit wide interface. The GPU would be priced at $359 at launch.
AMD Radeon HD 7890
  • Code Name: Tahiti LE
  • 1.5GB Frame Buffer
  • Release Date: Q2 2012
  • Price: 359 $"
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Old February 21, 2012, 02:41 PM
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at least the pricing seems better for the 78xx series. i just have to wait a few months for the 7870 to hit the price of the 6870 when i bought mine last march for 180.
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Old February 21, 2012, 05:27 PM
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dear lordy....AMD is going to release their entire stack again before nvidia puts something out?
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Old February 21, 2012, 10:58 PM
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Hopefully the 78xx will have better bang for buck at release then the 7770 (though I am sure pricing on the 7770 will find its place with some time). Its seems that AMD may actually get this whole lineup out before Nvidia releases any.
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Old February 22, 2012, 04:28 AM
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I wonder how the 7850 1GB will compare with the 6950... I mean, the winner is obvious, but percentage wise.
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Old February 22, 2012, 05:50 AM
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Remember, the "winner" was supposed to be obvious when the HD 7770 was launched too....
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Old February 22, 2012, 06:37 AM
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Looking like another step back, or at the least at side step. My GTX 480 is looking like it will beat all of these cards so I will be waiting for Nvidia's new high end cards to be released.
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