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Radeon HD 4830 1GB vs Radeon HD 5670

Intro

The Radeon HD 4830 1GB comes with a core clock frequency of 575 MHz and a GDDR4 memory speed of 900 MHz. It also makes use of a 256-bit memory bus, and uses a 55 nm design. It is made up of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 5670, which uses a 40 nm design. AMD has set the core speed at 775 MHz. The GDDR5 memory runs at a frequency of 1000 MHz on this model. It features 400(80x5) SPUs along with 20 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
Radeon HD 4830 1GB 95 Watts
Difference: 34 Watts (56%)

Memory Bandwidth

In theory, the Radeon HD 5670 will be 11% faster than the Radeon HD 4830 1GB overall, due to its higher bandwidth. (explain)

Radeon HD 5670 64000 MB/sec
Radeon HD 4830 1GB 57600 MB/sec
Difference: 6400 (11%)

Texel Rate

The Radeon HD 4830 1GB should be a little bit (more or less 19%) better at texture filtering than the Radeon HD 5670. (explain)

Radeon HD 4830 1GB 18400 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 2900 (19%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4830 1GB is a better choice, by far. (explain)

Radeon HD 4830 1GB 9200 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 3000 (48%)

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 4830 1GB

Amazon.com

Check prices at:

Radeon HD 5670

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 4830 1GB Radeon HD 5670
Manufacturer AMD AMD
Year Oct 21, 2008 January 14, 2010
Code Name RV770 LE Redwood XT
Memory 1024 MB 1024 MB
Core Speed 575 MHz 775 MHz
Memory Speed 1800 MHz 4000 MHz
Power (Max TDP) 95 watts 61 watts
Bandwidth 57600 MB/sec 64000 MB/sec
Texel Rate 18400 Mtexels/sec 15500 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 6200 Mpixels/sec
Unified Shaders 640(128x5) 400(80x5)
Texture Mapping Units 32 20
Render Output Units 16 8
Bus Type GDDR4 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 40 nm
Transistors 956 million 627 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 4830 1GB

Amazon.com

Check prices at:

Radeon HD 5670

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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