http://wccftech.com/amd-hd7900-gcn-southern-island-details-leaked-frequencies-prices-release-dates/
"GCN HD7970 (XT Tahiti):
The HD7970 is based on the 28nm Tahiti XT core and would be the fastest single chip GPU of the 7000 Series. It features a massive 2048 Cores (Shader Processors) or 32 CU (Compute Units),128 texture units and the core frequency is maintained at 1Ghz. One bad news is that AMD has ruled out the use of Rambus XDR2 memory and is reusing the 1.37 GHz GDDR5 quad data rate, ie at 5.5 GHz of bits used by these GDDR5 384-bit will result in 3 GB of RAM.
This means that the HD7970 would feature a record memory bandwidth of 264 GB / s against 174GB / s of HD6970. Pricing of the card would be set at $449 US.
GCN HD7950 (Pro Tahiti):
Just like its elder brother, The HD7950 would be based on the Pro version of the Tahiti Core which features 1920 cores (30 UCs), 120 texture units while the core frequency is maintained at 900Mhz. The GPU would feature a 3GB memory running at 5Ghz along a 384-bit wide memory interface. Memory bandwidth is rated at 240GB / s. Pricing of the HD7950 is expected around $349 US.
Both 7900 Series based HD7970 and HD7950 would be launched at the CES 2012 Event in Las Vegas, From 10 to 13 January."
"GCN HD7970 (XT Tahiti):
The HD7970 is based on the 28nm Tahiti XT core and would be the fastest single chip GPU of the 7000 Series. It features a massive 2048 Cores (Shader Processors) or 32 CU (Compute Units),128 texture units and the core frequency is maintained at 1Ghz. One bad news is that AMD has ruled out the use of Rambus XDR2 memory and is reusing the 1.37 GHz GDDR5 quad data rate, ie at 5.5 GHz of bits used by these GDDR5 384-bit will result in 3 GB of RAM.
This means that the HD7970 would feature a record memory bandwidth of 264 GB / s against 174GB / s of HD6970. Pricing of the card would be set at $449 US.
GCN HD7950 (Pro Tahiti):
Just like its elder brother, The HD7950 would be based on the Pro version of the Tahiti Core which features 1920 cores (30 UCs), 120 texture units while the core frequency is maintained at 900Mhz. The GPU would feature a 3GB memory running at 5Ghz along a 384-bit wide memory interface. Memory bandwidth is rated at 240GB / s. Pricing of the HD7950 is expected around $349 US.
Both 7900 Series based HD7970 and HD7950 would be launched at the CES 2012 Event in Las Vegas, From 10 to 13 January."
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