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Along with their announcement of their annual desktop GPU rebadge, AMD has also released the full product specifications for their new Radeon HD 8000M mobile GPUs. These GPUs were first announced back in December, but at the time AMD only gave us vague descriptions of each series with little-to-no information on the individual SKUs. Now with CES kicking into gear, we have the individual SKU information on hand.

AMD Radeon 8800M Series GPU Specification Comparison
  AMD Radeon HD 8870M AMD Radeon HD 8850M AMD Radeon HD 8830M
Was Variant Of 7800M Variant Of 7800M Variant Of 7800M
Stream Processors 640 640 640
Texture Units 40 40 40
ROPs 16 16 16
Core Clock 725MHz 575-725MHz 575MHz
Boost Clock 775MHz 625-775MHz 625MHz
Memory Clock 4.5GHz GDDR5 / 2GHz DDR3 4.5GHz GDDR5 / 2GHz DDR3 2GHz DDR3
Memory Bus Width 128-bit 128-bit 128-bit
VRAM 2GB 2GB 2GB
FP64 1/16 1/16 1/16
Transistor Count 1.5B 1.5B 1.5B
GPU Heathrow Heathrow Heathrow
Manufacturing Process TSMC 28nm TSMC 28nm TSMC 28nm
Architecture GCN GCN GCN

Starting at the top is the 8800M series, which is composed of a number of not-quite rebadges of 7800M parts. All of these GPUs are based on the Heathrow GPU (desktop name: Cape Verde), packing 640 Stream Processors along with 40 texture units and 16 ROPs. This is paired with 2GB of memory on a 128bit bus, with AMD using both GDDR5 and DDR3 depending on the specific SKU.

Other than being minor variations on existing AMD GPUs, these products also enable AMD’s Boost Clock technology for the first time in a mobile part. Boost Clock allows the GPU to turbo up to a higher clockspeed so long as the GPU is under its power and temperature limits, allowing AMD to scrape every bit of thermal headroom from their GPUs. This technology has been available on certain desktop GPUs for more than half a year, but this is the first time we’ve seen it on a mobile part. Notably, NVIDIA’s mobile parts do not feature NVIDIA’s equivalent technology (GPU Boost) despite the fact that they introduced the technology on the desktop first, so AMD is ahead of NVIDIA in this regard.

AMD Radeon 8700M Series GPU Specification Comparison
  AMD Radeon HD 8790M AMD Radeon HD 8770M AMD Radeon HD 8750M AMD Radeon HD 8730M
Was New New New New
Stream Processors 384 384 384 384
Texture Units 24 24 24 24
ROPs 8 8 8 8
Core Clock 850MHz 775MHz 620-775MHz 650MHz
Boost Clock 900Mhz 825MHz 670-825MHz 700MHz
Memory Clock 4.5GHz GDDR5 4.5GHz GDDR5 4GHz GDDR5 / 2GHz DDR3 2GHz DDR3
Memory Bus Width 128-bit 128-bit 128-bit 128-bit
VRAM 2GB 2GB 2GB 2GB
FP64 1/16 1/16 1/16 1/16
Transistor Count ? ? ? ?
GPU Mars Mars Mars Mars
Manufacturing Process TSMC 28nm TSMC 28nm TSMC 28nm TSMC 28nm
Architecture GCN GCN GCN GCN

Below the 8800M series is the 8700M series, marking the introduction of AMD’s new Mars GPU. This is a 4th (and presumably final) first-generation GCN GPU, packing 384 stream processors, 24 texture units, and 8 ROPs. The 8700M is connected via a 128bit memory bus to 2GB of either GDDR5 or DDR3 depending on the SKU, and like the 8800M series also features AMD’s Boost Clock. Interestingly, all Mars products only offer a PCIe 8x bus instead of the GPU industry standard 16x. The performance difference on these lower-performance parts should be miniscule, but it’s an example of one of the ways AMD was able to achieve their smaller die size by reducing the number of pins that needed to connect to the GPU.

AMD Radeon 8600M/8500M Series GPU Specification Comparison
  AMD Radeon HD 8690M AMD Radeon HD 8670M AMD Radeon HD 8590M AMD Radeon HD 8570M
Was New New New New
Stream Processors 384 384 384 384
Texture Units 24 24 24 24
ROPs 8 8 8 8
Core Clock 775MHz 775MHz 620MHz 650MHz
Boost Clock 825MHz 825MHz 700MHz 700MHz
Memory Clock 4.5GHz GDDR5 2GHz DDR3 4.5GHz GDDR5 2GHz DDR3
Memory Bus Width 64-bit 64-bit 64-bit 64-bit
VRAM 1GB 1GB 1GB 1GB
FP64 1/16 1/16 1/16 1/16
Transistor Count ? ? ? ?
GPU Mars Mars Mars Mars
Manufacturing Process TSMC 28nm TSMC 28nm TSMC 28nm TSMC 28nm
Architecture GCN GCN GCN GCN

Finally we have the 8600M and 8500M series. These are essentially cut-down Mars parts, halving the memory busses from 128bits wide to 64bits wide, and should significantly castrate performance in the process. The feature set and functional unit counts are otherwise identical to the 8700M series. The difference between the 8600M and 8500M series appears to come down to solely clockspeeds; the 8600M parts are clocked up to 775MHz, while the 8500M are clocked up to 620MHz/650MHz.

Source: AMD Radeon HD 8000M Specifications

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  • iMacmatician - Tuesday, January 08, 2013 - link

    From the spec PDF, its memory should be DDR3, not GDDR3. Reply
  • chucknelson - Tuesday, January 08, 2013 - link

    Are any of these new 8000 mobile chips rumored to be in the next-gen consoles from Sony or Microsoft? Reply
  • A5 - Tuesday, January 08, 2013 - link

    Some people think a modified 8700M part is the basis for the next XBox. The rumors around the PS4 seem to be pointing at a 6750-class part. Reply
  • silverblue - Wednesday, January 09, 2013 - link

    Mars looks for all the world like the GCN replacement for the VLIW4 parts in Trinity. Reply
  • ZippityD - Saturday, January 12, 2013 - link

    Hopefully these cards end up coming with drivers. I've learned not to trust AMD on that point, so I'll be waiting for others to test these cards first. Reply

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