ATI Mobility Radeon HD 4860 vs ATI Mobility Radeon HD 4830

ATI Mobility Radeon HD 4860

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The Mobility HD 4860 is based off of the 40nm RV740 core with less shader cores than the Mobility HD 4850 and only a 128 bit memory bus. Because of the high core clock and GDDR5 memory, the card should still be able to perform comparatively fast.

An initial review of the desktop HD 4750 with similar specifications than the Mobility HD 4860 (but at higher clock rates) shows a score of 6000 points in the GPU test of 3DMark Vantage. According to our benchmarks, this score puts the AMD card above the GeForce 280M.

AMD has also published a benchmark comparison between the HD 4850 and HD 4860 mobile graphics cards and showed that the 4860 was able to perform a few percentage points better in 3DMark06 under 1920x1200 pixel resolution.

 

At Cebit 2009, Asus showed us a 15" laptop with a Mobility Radeon HD 4860 for a hopeful launch in Q2 2009. Our press contact stated that the mobile HD 4860 may perform a bit worse than the mobile HD 4850. In the presented pre-production sample, there was an unspecified "Mobility Radeon 4500 Series" graphics card installed that scored only a bit above 2000 points in 3DMark06.

The features of the HD 4860 should be comparable to the HD 4850 with regards to Avivo HD video functionality, Powerplay and the integrated sound controller for HDMI output.

ATI Mobility Radeon HD 4830

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The AMD ATI Mobility Radeon HD 4830 is a slower clocked Mobility HD 4860 and based on the 40nm RV740 core. Therefore, it is similar to the desktop HD 4700 series. Because of the 40nm production process, the power consumption should be similar to the HD 4670 (according to rumors).

Instead of GDDR5 memory of the HD 4860, the 4830 can be only equipped with slow DDR3 or faster GDDR3. Therefore, the 128 Bit memory bus becomes a bottle neck and the performance is clearly degraded.

The gaming performance of the ATI Mobility Radeon HD4830 is sufficient for demanding games of 2009 in medium - high details. Our gaming benchmarks (see below) showed that a high preset in Crysis or NFS Shift resulted in barely playable framerates around 25 fps. Less demanding games, are playable in high resolution and detail settings.

The Mobility HD 4830 is based on the RV740 chip and features 640 stream processors (128 5-dimensional shader cores). These cores do the graphic work of the shader- and pixel pipelines of older GPUs. The stream processors are also called ALUs and are grouped in five-way VLIW units. Each of the five instructions of a VLIW bundle has to be independent from the others and therefore the performance depends on the optimization of the driver.

The Mobility Radeon HD 4830 includes the Avivo HD called video technology including an onboard soundchip for 7.1 sound output over HDMI or DisplayPort and the 2nd generation UVD (Unified Video Decoder). This UVD 2 supports full bitstream decoding of H.264/MPEG-4 AVC and VC-1 streams. In addition to this, it also supports dual video stream decoding and Picture-in Picture mode which makes the UVD full BD-Live compliant. Simplified, the Avivo HD technology handles all video tasks and enables the GPU to decode HD videos.

The HD4830 was replaced by the Mobility Radeon HD 5830, which features a higher shader count (800) and DirectX 11 capable shaders. Therefore, the gaming performance of the 5830 is better, but also the power consumption should be higher (same 40nm process, although more mature).

Compared to the desktop cards, the Mobility Radeon is similar to the ATI Radeon HD 4730. Still, the desktop 4730 offers a noticeable higher performance due to GDDR5 usage and higher clock speeds.

 

ATI Mobility Radeon HD 4860ATI Mobility Radeon HD 4830
ManufacturerATIATI
Mobility Radeon HD 4800 Series
Mobility Radeon HD 4860 640 @ 650 MHz128 Bit @ 1000 MHz
Mobility Radeon HD 4850 (compare) 800 @ 500 MHz256 Bit @ 850 MHz
Mobility Radeon HD 4830 640 @ 550 MHz128 Bit @ 700 MHz
Mobility Radeon HD 4860 640 @ 650 MHz128 Bit @ 1000 MHz
Mobility Radeon HD 4850 (compare) 800 @ 500 MHz256 Bit @ 850 MHz
Mobility Radeon HD 4830 640 @ 550 MHz128 Bit @ 700 MHz
CodenameM97-XTM97
ArchitectureTerascale 1Terascale 1
640 - 640 -
Core650 MHz550 MHz
Memory1000 MHz700 MHz
Bus128 Bit128 Bit
MemoryGDDR5GDDR3, DDR3
nono
DirectXDirectX 10.1, 4.1DirectX 10.1, 4.1
Transistors826 Million826 Million
Technology40 nm40 nm
FeaturesPowerplay, CrossFireX support, Powerplay, CrossFireX support, 
Size
Introduced03.03.2009 03.03.2009
832 GFlops Computing Power512 - 768 GFlops Computing Power
Manufacturerhttp://ati.amd.com/products/mobilityrade...http://ati.amd.com/products/mobilityrade...

3DMark Vantage
P Result 1280x1024 + ATI Mobility Radeon HD 4830
P GPU no PhysX 1280x1024 + ATI Mobility Radeon HD 4830
3DMark 05 - Standard 1024x768
14938 Points (28%)
3DMark 06 Standard 1280x1024 + ATI Mobility Radeon HD 4830
Cinebench R10 Shading 32Bit + ATI Mobility Radeon HD 4830

Average Benchmarks ATI Mobility Radeon HD 4830 → 100%

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

Need for Speed Shift

Need for Speed Shift

2009
low 800x600
Mobility Radeon HD 4830:
64.9  fps
med. 1024x768
Mobility Radeon HD 4830:
36.7  fps
high 1366x768
Mobility Radeon HD 4830:
24.6  fps
Mobility Radeon HD 4830:
»
Anno 1404

Anno 1404

2009
low 1024x768
Mobility Radeon HD 4830:
132.3  fps
Mobility Radeon HD 4830:
»
F.E.A.R. 2

F.E.A.R. 2

2009
low 800x600
Mobility Radeon HD 4830:
168.1  fps
med. 1024x768
Mobility Radeon HD 4830:
88.1  fps
Mobility Radeon HD 4830:
»
Call of Duty 4 - Modern Warfare

Call of Duty 4 - Modern Warfare

2007
low 800x600
Mobility Radeon HD 4830:
169.7  fps
med. 1024x768
Mobility Radeon HD 4830:
61.5  fps
Mobility Radeon HD 4830:
»
Supreme Commander - FA Bench

Supreme Commander - FA Bench

2007
med. 1024x768
Mobility Radeon HD 4830:
43.1  fps
high 1024x768
Mobility Radeon HD 4830:
35.7  fps
Mobility Radeon HD 4830:
»
Crysis - GPU Benchmark

Crysis - GPU Benchmark

2007
low 1024x768
Mobility Radeon HD 4830:
99.4  fps
med. 1024x768
Mobility Radeon HD 4830:
59.2  fps
high 1024x768
Mobility Radeon HD 4830:
32.3  fps
Mobility Radeon HD 4830:
»
Crysis - CPU Benchmark

Crysis - CPU Benchmark

2007
low 1024x768
Mobility Radeon HD 4830:
106.9  fps
med. 1024x768
Mobility Radeon HD 4830:
54.4  fps
high 1024x768
Mobility Radeon HD 4830:
27.5  fps
Mobility Radeon HD 4830:
»

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Redaktion, 2017-09- 8 (Update: 2017-09-11)