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Radeon HD 4730 vs Radeon HD 4830 512MB

Intro

The Radeon HD 4730 makes use of a 55 nm design. AMD has clocked the core speed at 700 MHz. The GDDR5 RAM runs at a frequency of 900 MHz on this card. It features 640(128x5) SPUs as well as 32 Texture Address Units and 8 ROPs.

Compare all that to the Radeon HD 4830 512MB, which comes with core clock speeds of 575 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB 95 Watts
Radeon HD 4730 140 Watts
Difference: 45 Watts (47%)

Memory Bandwidth

Both cards have the exact same bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The Radeon HD 4730 is a lot (more or less 22%) better at texture filtering than the Radeon HD 4830 512MB. (explain)

Radeon HD 4730 22400 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 4000 (22%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 4830 512MB is superior to the Radeon HD 4730, by far. (explain)

Radeon HD 4830 512MB 9200 Mpixels/sec
Radeon HD 4730 5600 Mpixels/sec
Difference: 3600 (64%)

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 4830 512MB

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 4830 512MB
Manufacturer AMD AMD
Year Jun 8, 2009 Oct 21, 2008
Code Name RV770/CE RV770 LE
Memory 512 MB 512 MB
Core Speed 700 MHz 575 MHz
Memory Speed 3600 MHz 1800 MHz
Power (Max TDP) 140 watts 95 watts
Bandwidth 57600 MB/sec 57600 MB/sec
Texel Rate 22400 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 5600 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 640(128x5) 640(128x5)
Texture Mapping Units 32 32
Render Output Units 8 16
Bus Type GDDR5 GDDR3
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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, 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 most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 4730

Amazon.com

Check prices at:

Radeon HD 4830 512MB

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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