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Radeon HD 4730 vs Radeon HD 6950

Intro

The Radeon HD 4730 features clock speeds of 700 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs as well as 32 TAUs and 8 ROPs.

Compare all of that to the Radeon HD 6950, which comes with GPU core speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also features 1408 SPUs, 88 Texture Address Units, and 32 ROPs.

Display Graphs

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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

Theoretically, 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 should be a lot (more or less 214%) more effective at AF than the Radeon HD 4730. (explain)

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

Pixel Rate

The Radeon HD 6950 should be much (approximately 357%) better at AA than the Radeon HD 4730, and should be capable of handling higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

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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