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 @ 650MHz128 Bit @ 1000MHz
Mobility Radeon HD 4850 800 @ 500MHz256 Bit @ 850MHz

Mobility Radeon HD 4830

640 @ 550MHz128 Bit @ 700MHz
CodenameM98
ArchitectureTerascale 1
Pipelines800 - unified
Core Speed *500 MHz
Shader 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 Result no PhysX 1280x1024
0% 100%
min: 5000      avg: 5285.3 (14%)     median: 5263.5 (14%)     max: 5614 Points
3DMark Vantage - P GPU no PhysX 1280x1024
0% 100%
min: 5307      avg: 5381.7 (12%)     median: 5347 (12%)     max: 5491 Points
3DMark 06
0% 100%
min: 9314      avg: 9842.8 (33%)     median: 9612 (33%)     max: 10965 Points
3DMark 05 - Standard 1024x768
0% 100%
min: 12318      avg: 15419 (42%)     median: 16496 (45%)     max: 17443 Points
3DMark 03 - Standard 1024x768
0% 100%
min: 33658      avg: 33658 (22%)     median: 33658 (22%)     max: 33658 Points
3DMark 2001SE - Standard 1024x768
0% 100%
min: 41976      avg: 41976 (69%)     median: 41976 (69%)     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
0% 100%
min: 56.27      avg: 56.3 (51%)     median: 56.3 (51%)     max: 56.27 Points
Cinebench R10 - Shading 32Bit
0% 100%
min: 5682      avg: 5682 (49%)     median: 5682 (49%)     max: 5682 Points
- 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:
430  fps      Compare
med.:
180  fps      Compare
high:
111  fps      Compare
ultra:
78  fps      Compare
» With all tested laptops playable in detail settings ultra.
Mafia 2
Mafia 2 (2010)
low:
63  fps      Compare
med.:
53.8  fps      Compare
high:
45.7  fps      Compare
ultra:
29.5  fps      Compare
» With all tested laptops playable in detail settings high.
StarCraft 2
StarCraft 2 (2010)
low:
254  fps      Compare
med.:
73  fps      Compare
high:
50  fps      Compare
ultra:
30  fps      Compare
» With all tested laptops playable in detail settings high.
Battlefield: Bad Company 2
low:
133  fps      Compare
med.:
70  fps      Compare
high:
47  fps      Compare
ultra:
25  fps      Compare
» With all tested laptops playable in detail settings high.
CoD Modern Warfare 2
ultra:
40  fps      Compare
» With all tested laptops playable in detail settings ultra.
Risen
Risen (2009)
high:
37  fps      Compare
» With all tested laptops playable in detail settings high.
Need for Speed Shift
Need for Speed Shift (2009)
high:
47  fps      Compare
» With all tested laptops playable in detail settings high.
Anno 1404
Anno 1404 (2009)
ultra:
42  fps      Compare
» With all tested laptops playable in detail settings ultra.
Sims 3
Sims 3 (2009)
low:
251.2  fps      Compare
med.:
173.7  fps      Compare
high:
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:
193.6  fps      Compare
med.:
119.1  fps      Compare
high:
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:
61.6  fps      Compare
med.:
47.1  fps      Compare
» With all tested laptops playable in detail settings med..
Left 4 Dead
Left 4 Dead (2008)
high:
115  fps      Compare
» With all tested laptops playable in detail settings high.
Far Cry 2
Far Cry 2 (2008)
low:
75 80.3 ~ 78 fps      Compare
high:
45 50.1 ~ 48 fps      Compare
» With all tested laptops playable in detail settings high.
Crysis Warhead
Crysis Warhead (2008)
low:
50  fps      Compare
ultra:
16  fps      Compare
» With all tested laptops playable in detail settings low.
Racedriver: GRID
Racedriver: GRID (2008)
low:
107.7  fps      Compare
med.:
68  fps      Compare
high:
62.1  fps      Compare
» With all tested laptops playable in detail settings high.
Trackmania Nations Forever
Trackmania Nations Forever (2008)
high:
85.4  fps      Compare
ultra:
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:
133 197.6 ~ 165 fps      Compare
med.:
100.2  fps      Compare
high:
64.5 68 ~ 66 fps      Compare
» With all tested laptops playable in detail settings high.
Supreme Commander - FA Bench
Supreme Commander - FA Bench (2007)
med.:
57.2  fps      Compare
high:
47 52.6 ~ 50 fps      Compare
» With all tested laptops playable in detail settings high.
Crysis - GPU Benchmark
Crysis - GPU Benchmark (2007)
low:
99.5  fps      Compare
med.:
60.7  fps      Compare
high:
44.8  fps      Compare
» With all tested laptops playable in detail settings high.
Crysis - CPU Benchmark
Crysis - CPU Benchmark (2007)
low:
113.4 130.5 ~ 122 fps      Compare
med.:
57.6  fps      Compare
high:
38.9 43.8 ~ 41 fps      Compare
» With all tested laptops playable in detail settings high.
World in Conflict - Benchmark
World in Conflict - Benchmark (2007)
med.:
55 76 ~ 66 fps      Compare
high:
34 46 ~ 40 fps      Compare
» With most tested laptops playable in detail settings high.
Call of Juarez Benchmark
Call of Juarez Benchmark (2006)
high:
43  fps      Compare
» With all tested laptops playable in detail settings high.
F.E.A.R.
F.E.A.R. (2005)
low:
461  fps      Compare
high:
141  fps      Compare
» With all tested laptops playable in detail settings high.
World of Warcraft
World of Warcraft (2005)
med.:
190  fps      Compare
high:
43  fps      Compare
» With all tested laptops playable in detail settings high.
Counter-Strike Source
Counter-Strike Source (2004)
high:
198  fps      Compare
» With all tested laptops playable in detail settings high.
Doom 3
Doom 3 (2004)
low:
186.3  fps      Compare