Notebookcheck

ATI Mobility Radeon HD 4850

The ATI Mobilty Radeon HD 4850 from AMD is a DirectX 10.1 upper middle-class notebook graphics adapter. Technically, the GPU is based on the desktop HD 4850 GPU but with a lower clock rate for reduced energy consumption.

The gaming performance of the ATI Mobility Radeon HD 4850 should be comparable to the desktop HD 4830 and is therefore very good at resolutions below 1080p. The high amount of shaders and the wide 256 bit bus can allow the card to run practically every DirectX 9 game in high resolutions and details. Demanding DirectX 10 games, such as Crysis, can be played with medium to high detail settings. Compared to an Nvidia GeForce GTX 260M, the HD 4850 should be a bit faster on average.

The newer Mobility HD 5850 is noticeably faster than the Mobility HD 4850 if GDDR5 graphics memory is present. If DDR3 with a smaller 128 Bit memory bus is used instead, then this would bottlebeck the 5850 to performance levels closer to that of the Mobility HD 4850.

The mobile HD 4850 core is based on the RV770 chip and features 800 stream processors (or 160 5-dimensional shader cores). These cores do the graphics work previously done by dedicated shader and pixel pipelines of older GPUs. The stream processors (also called ALUs) are grouped in five-way VLIW units. Each of the five instructions of a VLIW bundle has to be independent from the others, so the overall performance is highly dependent on driver optimizations.

The Mobility Radeon HD 4850 includes UVD 2, Avivo HD software and an onboard soundchip for 7.1 sound output over HDMI or DisplayPort. UVD 2 supports full bitstream decoding of H.264/MPEG-4 AVC and VC-1 streams by the GPU, thus reducing workload from the CPU. In addition to this, the software also supports dual video stream decoding and Picture-in Picture mode for full compliancy to the UVD BD-Live standards. Simply put, the Avivo HD technology is able to handle most video tasks and enables the GPU to decode HD videos.

AMD has claimed a current consumption of about 45-65 Watt for the cards part of the mobile HD 4850 to HD 4870 range. Still, it is unclear if this value represents the core chip alone or the entire MXM board with memory modules. We estimate that the VRAM chips would contribute about 5 Watts total to the overall energy demands of the mobile HD 4850.

Compared to the desktop ATI Radeon HD 4850, the mobile 4850 features a slower core clock and is therefore more similar to the desktop HD 4830 in terms of overall performance.

ManufacturerATI
Mobility Radeon HD 4800 Series
Mobility Radeon HD 4860 640 @ 650 MHz128 Bit @ 1000 MHz
Mobility Radeon HD 4850 800 @ 500 MHz256 Bit @ 850 MHz
Mobility Radeon HD 4830 640 @ 550 MHz128 Bit @ 700 MHz
CodenameM98
ArchitectureTerascale 1
Pipelines800 - unified
Core Speed *500 MHz
Memory Speed *850 MHz
Memory Bus Width256 Bit
Memory TypeGDDR3
Max. Amount of Memory1024 MB
Shared Memoryno
DirectXDirectX 10.1, Shader 4.1
Transistors956 Million
technology55 nm
FeaturesOpenGL 2.0, PCI-E 2.0 x16, Powerplay, DisplayPort support up to 2560x1600, HDMI support up to 1920x1080 (both with 7.1 AC3 Audio), 1x Dual-Link/Single-Link DVI, 1x Single-Link DVI Support (all display ports have to be supported by the laptop manufacturer)
Notebook Sizelarge
Date of Announcement09.01.2009
Link to Manufacturer Pagehttp://ati.amd.com/products/mobilityrade...
* The specified clock rates are only guidelines for the manufacturer and can be altered by them.

Benchmarks

3DMark Vantage
P GPU no PhysX 1280x1024 +
P Result 1280x1024 +
3DMark 06 +
3DMark 05 - Standard 1024x768
0%
100%
min: 12318     avg: 15419 (33%)     median: 16496 (35%)     max: 17443 Points
3DMark 2001SE - Standard 1024x768
0%
100%
min: 41976     avg: 41976 (44%)     median: 41976 (44%)     max: 41976 Points
PCMark Vantage - Gaming Score 1024x768
0%
100%
min: 4543     avg: 4543 (17%)     median: 4543 (17%)     max: 4543 Points
Cinebench R11.5 OpenGL 64Bit +
Cinebench R10 Shading 32Bit +
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card

Game Benchmarks

The following benchmarks stem from our benchmarks of review laptops. The performance depends on the used graphics memory, clock rate, processor, system settings, drivers, and operating systems. So the results don't have to be representative for all laptops with this GPU. For detailled information on the benchmark results, click on the fps number.

Fifa 11

Fifa 11

2010
low 800x600
430  fps    + Compare
med. 1024x768
180  fps    + Compare
high 1360x768
111  fps    + Compare
ultra 1920x1080
78  fps    + Compare
» With all tested laptops playable in detail settings ultra.
Mafia 2

Mafia 2

2010
low 800x600
63  fps    + Compare
med. 1024x768
53.8  fps    + Compare
high 1360x768
45.7  fps    + Compare
ultra 1920x1080
29.5  fps    + Compare
» With all tested laptops playable in detail settings high.
StarCraft 2
low 1024x768
254  fps    + Compare
med. 1360x768
73  fps    + Compare
high 1360x768
50  fps    + Compare
ultra 1920x1080
30  fps    + Compare
» With all tested laptops playable in detail settings high.
Battlefield: Bad Company 2
low 1024x768
133  fps    + Compare
med. 1366x768
70  fps    + Compare
high 1366x768
47  fps    + Compare
ultra 1920x1080
25  fps    + Compare
» With all tested laptops playable in detail settings high.
Need for Speed Shift

Need for Speed Shift

2009
high 1366x768
47  fps    + Compare
» With all tested laptops playable in detail settings high.
Anno 1404

Anno 1404

2009
ultra 1280x1024
42  fps    + Compare
» With all tested laptops playable in detail settings ultra.
Sims 3

Sims 3

2009
low 800x600
251.2  fps    + Compare
med. 1024x768
173.7  fps    + Compare
high 1280x1024
97.5  fps    + Compare
» With all tested laptops playable in detail settings high.
F.E.A.R. 2

F.E.A.R. 2

2009
low 800x600
193.6  fps    + Compare
med. 1024x768
119.1  fps    + Compare
high 1280x1024
86.1  fps    + Compare
» With all tested laptops playable in detail settings high.
GTA IV - Grand Theft Auto

GTA IV - Grand Theft Auto

2008
low 800x600
61.6  fps    + Compare
med. 1024x768
47.1  fps    + Compare
» With all tested laptops playable in detail settings med..
Left 4 Dead

Left 4 Dead

2008
high 1024x768
115  fps    + Compare
» With all tested laptops playable in detail settings high.
Far Cry 2

Far Cry 2

2008
low 640x480
75 80.3 ~ 78 fps    + Compare
high 1024x768
45 50.1 ~ 48 fps    + Compare
» With all tested laptops playable in detail settings high.
Crysis Warhead

Crysis Warhead

2008
low 800x600
50  fps    + Compare
ultra 1024x768
16  fps    + Compare
» With all tested laptops playable in detail settings low.
Racedriver: GRID

Racedriver: GRID

2008
low 800x600
107.7  fps    + Compare
med. 1024x768
68  fps    + Compare
high 1280x1024
62.1  fps    + Compare
» With all tested laptops playable in detail settings high.
Trackmania Nations Forever

Trackmania Nations Forever

2008
high 1024x768
85.4  fps    + Compare
ultra 1920x1080
40.6  fps    + Compare
» With all tested laptops playable in detail settings ultra.
Call of Duty 4 - Modern Warfare

Call of Duty 4 - Modern Warfare

2007
low 800x600
133 197.6 ~ 165 fps    + Compare
med. 1024x768
100.2  fps    + Compare
high 1280x1024
64.5 68 ~ 66 fps    + Compare