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Wednesday, December 07, 2011
AMD And Nvidia Introduce New Mobile GPUs

Both AMD and NVidia have updated their mobile series of GPUs. AMD launched the Radeon HD 7000 series while Nvidia introduced the GeForce 600M notebook graphics, a respin of its 500M series.

Starting from Nvidia, the new GeForce 600M notebook graphics includes the 610M, 630M, and 635M GPUs.

The 635M does get an upgrade in support for faster 3.6GHz equivalent GDDR5 memory, giving it a higher 57.6GB per second of bandwidth over the 555M's 50.2GB. Systems running the 635M have split specifications depending on the system: one version has nearly the same performance as the 630M, although the highest-end version has 144 cores, 24 texture units, the faster GDDR5 memory and a 192-bit bus.

The 610M features 48 visual processing cores, eight texture units, 900MHz core and DDR3 memory speeds, and a 64-bit bus.

The 630M has 6 cores, 16 texture units, a 672MHz core, and a 128-bit bus.

  GeForce GT 635M GeForce GT 555M GeForce GT 630M GeForce GT 540M GeForce 610M GeForce 520MX
Core GF106/GF108 GF106/GF108 GF108 GF108 GF119 GF119
Stream Processors 144/96 144/96 96 96 48 48
Texture Units 24/16 24/16 16 16 8 8
ROPs 24/4 24/4 4 4 4 4
Core Clock 675/753MHz 675/753MHz 672MHz 672MHz 900MHz 900MHz
Memory Clock 1.8/3.6GHz DDR3/GDDR5 1.8/3.14GHz DDR3/GDDR5 Up to 900MHz (1.8GHz) DDR3 900MHz (1.8GHz) DDR3 900MHz (1.8GHz) DDR3 900MHz (1.8GHz) DDR3
Memory Bus 192/128-bit 192/128-bit 128-bit 128-bit 64-bit 64-bit
Memory Bandwidth 43.2/57.6GB/s 43.2/50.2GB/s 28.8GB/s 28.8GB/s 14.4GB/s 14.4GB/s

AMD's Radeon HD 7000 series is not actually the Southern Island products based on TSMC?s new HKMG 28nm process we were expected. It is based on AMD?s Turks and Caicos GPUs, the same GPUs that make up part of the 6000M series. That because TSMC?s HKMG 28nm process is reportedly running late, with yields and production capacity low for high volume retail products, at least for 2011.

So AMD's Radeon HD 7000 series are based on 40nm silicon and the company's existing VLIW5 Terascale 2 architecture. The series announced today includes the 7400M, 7500M, and 7600M GPUs.

All three GPU families also feature DisplayPort 1.2 and HDMI 1.4a connectivity, as well as support for AMD HD3D and Blu-ray 3D. Their not-so-impressive specifications are illustrated below:

It is obvious that the specs don't hint at any great performance improvements over the 6400M and 6500M series. Although the 7500M has 80 more stream processors than the 6500M, the 7400M is also saddled with half the memory interface width of the 6400M. On the otehr hand, all the 7000M-series GPUs have UVD3 video decoding blocks, which support DivX and XviD video acceleration.

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