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Radeon HD 4730 vs Radeon HD 4850 2GB

Intro

The Radeon HD 4730 comes with clock speeds of 700 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Compare those specifications to the Radeon HD 4850 2GB, which features core speeds of 625 MHz on the GPU, and 993 MHz on the 2048 MB of GDDR4 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB 110 Watts
Radeon HD 4730 140 Watts
Difference: 30 Watts (27%)

Memory Bandwidth

In theory, the Radeon HD 4850 2GB should be 10% faster than the Radeon HD 4730 in general, due to its higher bandwidth. (explain)

Radeon HD 4850 2GB 63552 MB/sec
Radeon HD 4730 57600 MB/sec
Difference: 5952 (10%)

Texel Rate

The Radeon HD 4850 2GB will be a little bit (approximately 12%) more effective at anisotropic filtering than the Radeon HD 4730. (explain)

Radeon HD 4850 2GB 25000 Mtexels/sec
Radeon HD 4730 22400 Mtexels/sec
Difference: 2600 (12%)

Pixel Rate

The Radeon HD 4850 2GB should be much (more or less 79%) faster with regards to anti-aliasing than the Radeon HD 4730, and capable of handling higher screen resolutions better. (explain)

Radeon HD 4850 2GB 10000 Mpixels/sec
Radeon HD 4730 5600 Mpixels/sec
Difference: 4400 (79%)

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

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Radeon HD 4850 2GB

Amazon.com

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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 4850 2GB
Manufacturer AMD AMD
Year Jun 8, 2009 Jun 25, 2008
Code Name RV770/CE RV770 PRO
Memory 512 MB 2048 MB
Core Speed 700 MHz 625 MHz
Memory Speed 3600 MHz 1986 MHz
Power (Max TDP) 140 watts 110 watts
Bandwidth 57600 MB/sec 63552 MB/sec
Texel Rate 22400 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 5600 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 640(128x5) 800(160x5)
Texture Mapping Units 32 40
Render Output Units 8 16
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit
Fab Process 55 nm 55 nm
Transistors 956 million 956 million
Bus PCIe 2.0 x16 PCIe 2.0 x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 4730

Amazon.com

Check prices at:

Radeon HD 4850 2GB

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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