Another set of specifications for AMD's upcoming Radeon HD 8000 'Sea Islands' GPUs has been leaked by Hardwareinfo. The information has detailed specifications of AMD's Venus (HD 8900), Mars (HD 8800) and Oland (HD 8700) series.

AMD Radeon HD 8000 Series 'Sea Islands' Specifications:

AMD Radeon HD 8900 Series (Venus XT/ Venus Pro):

The AMD Radeon HD 8900 Series was already detailed by us in a previous leak here. The Venus lineup would consist of two GPU’s, the Venus XTX basedRadeon HD 8970and Venus XT/Pro (Still to be confirmed)Radeon HD 8950.

Venus would feature a die size of around 410mm2with atransistorcount of 5.1 Billion. The GPUs would still be manufactured on TSMC 28nm fabricationprocess.

The Venus XT (Radeon HD 8970) would be the flagship card of the Radeon HD 8000 series with the core packing 2560 Stream processors compared to 2048 on Tahiti XT (HD7970), 160 Texture Units and 48 raster operation units. The Venus Pro (Radeon HD 8950) would pack a core count of 2304 Stream Processors, 144 Texture Units but 48 ROPs.

On the memory front, both GPUs would have a 3GB GDDR5 VRAM running across a 384-bit wide interface. The memory would run at 6GHz frequency which would accumulate a bandwidth greater than 320GB/s. Both GPUs would come with Boost frequency out of box ranging above 1050 MHz.The cards would be powered by dual 8 Pin connectors and would support AMD ZeroCore idle power of 3W on board when non-operational. TDP would be set at 260W for HD 8970 and 210W for HD 8950.

Launch date is said to be in second quarter of 2013, More on that here.

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AMD Radeon HD 8970:

Venus XT5.1 Billion Transistors2560 Stream Processors3GB GDDR5 384-bit Memory1050 MHz Clock Speed6 GHz Memory Frequency260 Watt TDP

AMD Radeon HD 8950:

Venus XT5.1 Billion Transistors2304 Stream Processors3GB GDDR5 384-bit Memory1050 MHz Clock Speed5.5 GHz Memory Frequency210 Watt TDP

Based on the Venus GPUs would also be the Radeon HD 8990 (Venus XTX), AMD's next Dual Chip mammoth. While AMD couldn't come out with a Dual GPU card with its Southern Islands series, it certainly will with Sea Islands. The Radeon HD 8990 would launch in Q2-Q3 of 2013 with equipped with Two Venus XT cores each holding 2560 Stream processors and a 3 GB GDDR5 x2 along dual 384-bit memory interfaces. Due to high power output, the clocks would be set at a low 950 MHz frequency for core and 1250 MHz for memory.

AMD Radeon HD 8990:

Venus XTX5.1 Billion Transistors on each Core5120 Stream Processors3GB GDDR5 384-bit Memory x2950 MHz Clock Speed1250 GHz Memory Frequency

AMD Radeon HD 8800 Series (Mars XT/ Mars Pro):

The Performance segment of the Sea Islands lineup would fall to the Radeon HD 8800 series which would include the Mars XT and Mars Pro GPUs. Mars series GPUs would hold 3.4 Billion transistors on a 230mm2 die.

Mars XT or the Radeon HD 8870 would feature 1792 Stream processors, around 122 TMUs and 32 ROPs. The Mars Pro (Radeon HD 8850) would feature 1536 Stream processors, 96 TMUs and 32 ROPs. Both GPUs would feature a 256-bit memory interface with 2 GB VRAM. Considering Mars to be a direct successor to Cape Verde, we could consider much better performance per watt compared to it.

Radeon HD 8870:

Mars XT3.4 Billion Transistors1792 Stream Processors1000 MHz Core Clock2GB GDDR5 256-bit Memory

Radeon HD 8870:

Mars Pro3.4 Billion Transistors1536 Stream Processors925 MHz Core Clock2GB GDDR5 256-bit Memory

AMD Radeon HD 8700 Series (Oland XT/ Oland Pro):

Oland would be the entry level cards of Sea Islands lineup featuring two parts - Oland XT and Oland Pro. Oland would feature 2.1 Billiontransistors with a die size ranging around 135mm2 .

Oland XT (Radeon HD 8770) would feature 896 Stream processors with 46 TMUs and 16 ROPs and a clock speed set at 850 MHz while the Oland Pro (Radeon HD 8750) would feature 768 Stream processors with 40 TMUs and 16 ROPs running at 800 MHz.

Both cards would be equipped with a 2 GB GDDR5/ 128-bit memory interface clocked at 1150 MHz. Expect launch in Q1 2013.

Radeon HD 8770:

Oland XT2.1 Billion Transistors896 Stream Processors850 MHz Core Clock2GB GDDR5 128-bit Memory

Radeon HD 8770:

Oland Pro2.1 Billion Transistors768 Stream Processors800 MHz Core Clock2GB GDDR5 128-bit Memory

If all goes well, we would be looking at great competition between Sea Islands Radeon HD 8000 Series from AMD and Kepler Refresh GeForce 700 series from NVIDIA during Q2 of 2013. For details on what NVIDIA's prepping up to tackle the Sea Islands, head over to this link.