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AMD Tahiti GPU Specifications Compiled

btarunr

btarunr

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If the word on the optical fibers is true, we are less than a month away from the launch of AMD's next high-end graphics card family based on its next high-performance GPU, codenamed "Tahiti". According to 3DCenter, AMD will launch new graphics card models based on this GPU around January 10, 2012. It is expected that we'll learn a lot more about these GPUs, maybe even come across AIB-branded graphics cards, at the upcoming CES event.

3DCenter compiled specifications of "Tahiti", based on bits and pieces of information from various sources. The specs can be listed out as:
  • 4.50 billion transistors, die-area of 380 mm², built on TSMC 28 nm process
  • Advanced GCN 1D architecture
  • 2048 1D processing cores
  • 128 TMUs, 48 ROPs
  • 384-bit wide GDDR5 memory interface, memory clock slightly below 1 GHz, target bandwidth of 240~264 GB/s
In Gandhi's words, salt is as free as the air.

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I'll disregard all of this, how ever I'm interested to find out about the architecture changes if they have done it.
 
Nice can't wait to see performance.
 
Is it me, or 240-264GBps can't be achieved with memory under 1250 GDDR5 on 384 bit?
 
7 am in the morning is to late ( not slept yet) to have read that XD

Have to research more things now but am to tired.

Does sound very interesting though can't wait to see bench marks now, specifically open cl bench marks XD
 
Be crazy if they release a mid range tahiti model with the xdr2 or w/e or release a top model with 512 bit bus
 
Fishymachine said:
Is it me, or 240-264GBps can't be achieved with memory under 1250 GDDR5 on 384 bit?
Click to expand...
you are so correct.
1250 (5000) x 256bit = 160GBps
1250 (5000) x 384bit = 240GBps
 
I don't know german but the chart is clear. It's the core clock at slightly below 1000 Mhz. Memory 2500-2750 Mhz effective.
 
Do we subtract 800 million transistors off of the press release?
 
DannibusX said:
Do we subtract 800 million transistors off of the press release?
Click to expand...
it all depends on how they perform against their current cards and the competition. XD
 
I read somewhere we should expect 40% better performance with these new cards.
 
one question guys, if anyone knows anything about using amd 7900 the standard pcie 2.0 or 3.0?
 
tenxu24 said:
one question guys, if anyone knows anything about using amd 7900 the standard pcie 2.0 or 3.0?
Click to expand...

3.0, which will have no impact on performance
 
another thing, isn't 2500/2750 GDDR3 exactly the 1200/1375 needed to reach the specked bandwidth, and very same frequencies used in the 6900 serie
 
nt300 said:
I read somewhere we should expect 40% better performance with these new cards.
Click to expand...
cannot expect anything more from the specs, can we?


Fishymachine said:
another thing, isn't 2500/2750 GDDR3 exactly the 1200/1375 needed to reach the specked bandwidth, and very same frequencies used in the 6900 serie
Click to expand...
yep
 
Upto 60% perfomance gain....single HD 7970 card could be faster than the dual GPU monster that is the HD 6990 :eek:
 
Drugsh said:
Upto 60% perfomance gain....single HD 7970 card could be faster than the dual GPU monster that is the HD 6990 :eek:
Click to expand...

I highly doubt it but will have to wait and see.. :wtf:
 
W1zzard said:
3.0, which will have no impact on performance
Click to expand...

Thank you. I wonder if anyone knows if the graphics card pcie 3.0 will be compatible with PCIe 2.0 motherboards? If so, you would lose the potential of graphics cards to put in a PCIe 2.0?
 
of course:)
 
Tenxu24 said:
Thank you. I wonder if anyone knows if the graphics card pcie 3.0 will be compatible with PCIe 2.0 motherboards? If so, you would lose the potential of graphics cards to put in a PCIe 2.0?
Click to expand...

it will run just as fast in a 2.0 slot.

in a 1.0 slot it will be a few percent slower, maybe 10% tops
 
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