AMD Radeon HD 7950M vs AMD Radeon HD 7970M

AMD Radeon HD 7950M

The AMD Radeon HD 7950M is a DirectX 11 graphics card for large laptops and positioned in the high-end class. It is manufactured in 28nm and based on the GCN (Graphics Core Next) architecture.

The performance should be only slightly below the Radeon HD 7970M as rumors speak from a 3DMark11 performance of P4100 to P4300 points. The GTX 680M scored in first tests P4673 for comparison.

The design of the Radeon 7900M series has its roots to the Pitcairn chip as found, for example, on the desktop Radeon HD 7870. Further details regarding the 7950M in particular are not released yet.

Features of the 7950M include the new UVD3 video decoder for decoding MPEG-4 AVC/H.264, VC-1, MPEG-2, Flash and now also Multi-View Codec (MVC) and MPEG-4 part 2 (DivX, xVid) HD videos directly from the AMD GPU.

The 7900M series also supports automatic graphics switching between the integrated GPU and discrete GPU. Called Enduro, the technology supersedes AMD's Dynamic Switchable Graphics and is similar to Nvidia's Optimus. Furthermore, the 7950M can directly support up to 6 connected monitors using Eyefinity Technology if Enduro is disabled.

Other features of the 7900M series include ZeroCore for reducing power consumption when the display is turned off. Power Gating, however, is not supported according to AMD. PowerTune allows automatic overclocking and underclocking of the graphics card as long as the GPU is within its TDP range. For example, the chip may be underclocked when running FurMark and OCCT, but will overclock in certain games like Lost Planet, Crysis or Resident Evil 5.

The integrated HD audio processor is able to transmit HD Audio (TrueHD or DTS Master Audio) over HDMI and DisplayPort (e.g., for Blu-Ray videos). Additionally, it now allows audio to output simultaneously and in parallel to multiple devices with the new Discrete Digital Multipoint Audio (DDMA) feature.

Power consumption of the 7950M should be somewhat below the 7970M and therefore suited for big and heavy DTR-laptops.

AMD Radeon HD 7970M

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The AMD Radeon HD 7970M is a 28nm DirectX 11 graphics card based on the GCN (Graphics Core Next) architecture. Built primarily for large laptops, the advanced card is positioned near the top of the high-end category as of 2012.

The design of the Radeon 7900M series has its roots to the Pitcairn chip as found, for example, on the desktop Radeon HD 7870. The 7970M in particular is similar to its desktop 7870 counterpart with 1280 1D shader cores and 80 texture units, but has a core clock of only 850 MHz versus the 1000 MHz of the HD 7870. As a result, general performance of the HD 7970M is expected to lie somewhere between the 7850 and 7870 desktop Radeon cards.

When compared to mobile Nvidia GPUs, the HD 7970M performs significantly faster than the GeForce GTX 675M and roughly on par with the GTX 680M. In fact, the card scores P5900 in 3DMark 11, while the GTX 680M achieves P6000. Therefore, almost all demanding games of 2012 will run fluently with maxed out details and 1080p resolution.

Features of the 7970M include the new UVD3 video decoder for decoding MPEG-4 AVC/H.264, VC-1, MPEG-2, Flash and now also Multi-View Codec (MVC) and MPEG-4 part 2 (DivX, xVid) HD videos directly from the AMD GPU.

The 7900M series also supports automatic graphics switching between the integrated GPU and discrete GPU. Called Enduro, the technology supersedes AMD's Dynamic Switchable Graphics and is similar to Nvidia's Optimus. Furthermore, the 7970M can directly support up to 6 connected monitors using Eyefinity Technology if Enduro is disabled.

Power consumption of the 7970M is in the same ballpark as the GeForce GTX 675M. According to Dell, users can expect a 100 Watt TDP from the AMD GPU. The subsequently large heat output suits the 7970M as an option only for large laptops or DTRs (desktop replacements) that have relatively powerful cooling solutions.

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AMD Radeon HD 7950M

AMD Radeon HD 7970M

Radeon HD 7900M Series

Radeon HD 7970M Crossfire	2560 @ 0.85 GHz	2x 256 Bit @ 4800 MHz
Radeon HD 7970M	1280 @ 0.85 GHz	256 Bit @ 4800 MHz
Radeon HD 7950M	1280 @ 0.7 GHz	256 Bit @ 4000 MHz

Radeon HD 7970M Crossfire	2560 @ 0.85 GHz	2x 256 Bit @ 4800 MHz
Radeon HD 7970M	1280 @ 0.85 GHz	256 Bit @ 4800 MHz
Radeon HD 7950M	1280 @ 0.7 GHz	256 Bit @ 4000 MHz

Codename

Wimbledon Pro

Wimbledon XT

Architecture

GCN

Pipelines

1280 - unified

Core Speed

700 MHz

850 MHz

Memory Speed

4000 MHz

4800 MHz

Memory Bus Width

256 Bit

Memory Type

GDDR5

Max. Amount of Memory

2048 MB

Shared Memory

API

DirectX 11.1, Shader 5.0, OpenGL 4.1

DirectX 11.1, Shader 5.0, OpenGL 4.2

Power Consumption

50 Watt

100 Watt

Transistors

2.8 Billion

technology

28 nm

Features

OpenGL 4.2, OpenCL 1.2

Notebook Size

large

Date of Announcement

01.05.2012

Information

212 mm2 Die