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Radeon HD 4730 vs Radeon HD 6950

Intro

The Radeon HD 4730 features a GPU clock speed of 700 MHz, and the 512 MB of GDDR5 RAM runs at 900 MHz through a 128-bit bus. It also is comprised of 640(128x5) Stream Processors, 32 TAUs, and 8 ROPs.

Compare that to the Radeon HD 6950, which has a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is comprised of 1408 SPUs, 88 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4730 140 Watts
Radeon HD 6950 200 Watts
Difference: 60 Watts (43%)

Memory Bandwidth

In theory, the Radeon HD 6950 should perform much faster than the Radeon HD 4730 in general. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 4730 57600 MB/sec
Difference: 102400 (178%)

Texel Rate

The Radeon HD 6950 will be much (more or less 214%) faster with regards to anisotropic filtering than the Radeon HD 4730. (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 4730 22400 Mtexels/sec
Difference: 48000 (214%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6950 is the winner, by far. (explain)

Radeon HD 6950 25600 Mpixels/sec
Radeon HD 4730 5600 Mpixels/sec
Difference: 20000 (357%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon HD 4730

Amazon.com

Check prices at:

Radeon HD 6950

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 4730 Radeon HD 6950
Manufacturer AMD AMD
Year Jun 8, 2009 December 2010
Code Name RV770/CE Cayman Pro
Memory 512 MB 1024 MB
Core Speed 700 MHz 800 MHz
Memory Speed 3600 MHz 5000 MHz
Power (Max TDP) 140 watts 200 watts
Bandwidth 57600 MB/sec 160000 MB/sec
Texel Rate 22400 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 5600 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 640(128x5) 1408
Texture Mapping Units 32 88
Render Output Units 8 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 956 million 2640 million
Bus PCIe 2.0 x16 PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 4730

Amazon.com

Check prices at:

Radeon HD 6950

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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