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Radeon HD 4830 512MB vs Radeon HD 6750 1GB

Intro

The Radeon HD 4830 512MB features a GPU core speed of 575 MHz, and the 512 MB of GDDR3 memory is set to run at 900 MHz through a 256-bit bus. It also is made up of 640(128x5) Stream Processors, 32 Texture Address Units, and 16 ROPs.

Compare those specs to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has set the core frequency at 725 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this specific card. It features 720 SPUs as well as 36 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB 86 Watts
Radeon HD 4830 512MB 95 Watts
Difference: 9 Watts (10%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6750 1GB should in theory be a bit superior to the Radeon HD 4830 512MB in general. (explain)

Radeon HD 6750 1GB 64000 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 6400 (11%)

Texel Rate

The Radeon HD 6750 1GB will be a lot (more or less 42%) better at AF than the Radeon HD 4830 512MB. (explain)

Radeon HD 6750 1GB 26100 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 7700 (42%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6750 1GB is superior to the Radeon HD 4830 512MB, and very much so. (explain)

Radeon HD 6750 1GB 11600 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 2400 (26%)

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 512MB

Amazon.com

Check prices at:

Radeon HD 6750 1GB

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 512MB Radeon HD 6750 1GB
Manufacturer AMD AMD
Year Oct 21, 2008 January 2011
Code Name RV770 LE Juniper Pro
Memory 512 MB 1024 MB
Core Speed 575 MHz 725 MHz
Memory Speed 1800 MHz 4000 MHz
Power (Max TDP) 95 watts 86 watts
Bandwidth 57600 MB/sec 64000 MB/sec
Texel Rate 18400 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 640(128x5) 720
Texture Mapping Units 32 36
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 40 nm
Transistors 956 million 1040 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 largest amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4830 512MB

Amazon.com

Check prices at:

Radeon HD 6750 1GB

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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