Earlier we revealed NVIDIA’s first mobile graphics circuits at 28nm, using the older Fermi architecture. The same source has now acquired the names of AMD’s mobile GPUs at 28nm and it looks like a tough race between AMD and NVIDIA on the 28nm front.

SemiAccurate posted code names and circuits of NVIDIA’s first mobile 28nm family. These would be based on the older Fermi arhcitecture and be a mid landing for NVIDIA at 28nm before starting mass production of Kepler on the same node.

AMD’s Southern Islands architecture will be using the same found in Cayman (HD 6900 series) with VLIW-4 instructions, but during this summerat the AMD Fusion Developers Summit it discussed the whole new architecture that will appear with Southern Islands. There is talk of only the top circuit being based on this, while the lower-end circuits will be VLIW-4.

AMD has six mobile circuits coming, based on three different GPUs and those of you know AMD and ATI the code names are pretty standard.

  • XT – The full version, and top model of the series
  • Pro – The step below XT, lower frequencies and portions deactivated

AMD_28nm_mobile

Chelsea is most likely the slowest GPU of the series. Considering Zacate, Llano, Sandy Bridge and Ivy Bridge all have capable integrated GPUs a model like this one almost seems superfluent. Chelsea gets 25W and 35W TDP, 128-bit memory bus connected to DDR3 or GDDR5, and finally scores P9000 and P11000 in 3DMark Vantage.

Heathrow will, like Chelsea sport 128-bit memory bus that connects to DDR3 or GDDR5, but Heathrow XT will only use GDDR5. We see a TDP at 35W and 45W with P11000+ and P12000+ in 3DMark Vantage.

Wimbledon will be the top model with a 256-bit memory bus with GDDR5 memory and 60W to 80W TDP. The performance in 3DMark stretches to P14000 and P16000 depending on model, and Wimbledon XT gets 4 GB, which does feel a bit much for notebooks since they can’t output really high resolutions.

Like NVIDIA the first mobile models from AMD should be available in products in January, while Wimbledon Pro and XT will have to wait another month. AMD and NVIDIA have always had a tough balance walk on the mobile market where one has surpassed the other every other generation.

Source: SemiAccurate

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