AMD Radeon HD 7870M

AMD Radeon HD 7870M

The AMD Radeon HD 7870M is a 28nm DirectX 11 graphics card based on the GCN (Graphics Core Next) architecture. Built primarily for large laptops, the graphics card is positioned in the performance category as of 2012.

The design of the Radeon 7800M series has its roots to the Cape Verde chip as found, for example, on the desktop Radeon HD 7770 with 640 1D shader cores and 40 texture units. However it has a core clock of only 800 MHz versus the 1000 MHz of the HD 7770.  As a result, general performance of the HD 7870M is expected to lie somewhere between the 7750 and 7770 desktop Radeon cards.

The 3D performance of the graphics card is clearly better than a Nvidia GeForce GTX 560M. The 3DMark 11 GPU test even is on par with a fast GeForce GTX 670M. In games a Geforce GTX 660M should offer a similar performance. AMD compared the 7870M in their announcement with the Nvidia GeForce GTX 560M that could be beaten in AvP, Batman AC, Battlefield 3, Crysis 2, Metro 2033, Skyrim and Wolfenstein rather clearly. However, keep in mind that the settings and games were chosen by AMD. 

Using OpenCL 1.2, the 10 Compute cores of the HD 7870M can be used for general computational tasks.

Features of the 7870M 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 7800M 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 7870M can directly support up to 6 connected monitors using Eyefinity Technology if Enduro is disabled.

Other features of the 7800M series include ZeroCore for reducing power consumption when the display is turned off and Power Gating to power down areas of the chip that are not used. 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 7870M should be clearly lower than the 7970M (100W TDP) as the desktop counterparts 7750 and 7770 range between 55-80 Watt (but ACP average power). Rumors speak of 45 Watt, therefore only large laptops are suited for the 7870M.

ManufacturerAMD
Radeon HD 7800M Series
Radeon HD 7870M 640 @ 800MHz128 Bit @ 4000MHz

Radeon HD 7850M

640 @ 675MHz128 Bit @ 4000MHz
CodenameHeathrow XT
ArchitectureGCN
Pipelines640 - unified
Core Speed *800 MHz
Shader Speed *800 MHz
Memory Speed *4000 MHz
Memory Bus Width128 Bit
Memory TypeGDDR5
Shared Memoryno
DirectXDirectX 11.1, Shader 5.1
technology28 nm
FeaturesOpenCL 1.2
Notebook Sizelarge
Date of Announcement24.04.2012
* The specified clock rates are only guidelines for the manufacturer and can be altered by them.

Benchmarks

3DMark 11 - Performance GPU 1280x720
0% 100%
min: 2702      avg: 2702 (17%)     median: 2702 (17%)     max: 2702 points
...
Radeon HD 5770 -11%
Radeon HD 7870M
GeForce GTX 460 768MB 4%
Radeon HD 6790 7%
Radeon HD 7770 15%
...
0%
100%
3DMark 11 - Performance 1280x720
0% 100%
min: 3037      avg: 3037 (23%)     median: 3037 (23%)     max: 3037 points
3DMark Vantage - P Result no PhysX 1280x1024
0% 100%
min: 13065      avg: 13065 (34%)     median: 13065 (34%)     max: 13065 Points
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card

For more games that might be playable and a list of all games and graphics cards visit our Gaming List

Notebook reviews with AMD Radeon HD 7870M graphics card

Samsung 700G7C-T01US: Intel Core i7 3630QM, 17.3", 3.8 kg
  External Review » Samsung 700G7C-T01US

» Comparison of GPUs
Detailled list of all laptop GPUs with a short description. Classified and sorted by performance.

» Benchmark List
Sortable and restrainable list of all GPUs with benchmarks (e.g. 3DMarks).

» Notebook Gaming List
Which game can be played with my graphics card.

Class 1
GeForce GTX 590
GeForce GTX 760
GeForce GTX 580
Radeon HD 6970
GeForce GTX 750 Ti
GeForce GTX 570
GeForce GTX 560 Ti
Radeon HD 6870
Radeon HD 5850
Radeon HD 7770
Radeon HD 7770
GeForce GTX 460 768MB
Radeon HD 6790
Radeon HD 5770
GeForce GTX 550 Ti
Class 2
GeForce GTS 450
Radeon HD 4850
Class 3
Radeon HD 5670
GeForce GT 240
GeForce GT 430
Radeon HD 5570
GeForce GT 220
Radeon HD 6450 GDDR5
Class 4
Radeon R3 (Mullins/Beema) *
Class 5
Radeon HD 4350
GeForce G 107M *
PowerVR G6400
Chrome9HD *
Class 6
unknown *

* Approximate position of the graphics adapter

> Notebook / Laptop Reviews and News > FAQ / Tips / Technics > Comparison of Laptop Graphics Cards > AMD Radeon HD 7870M
Author: Klaus Hinum (Update: 2013-01-17)