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Radeon HD 4830 512MB vs Radeon HD 7750

Intro

The Radeon HD 4830 512MB features core clock speeds of 575 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 640(128x5) SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon HD 7750, which makes use of a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 memory runs at a speed of 1125 MHz on this card. It features 512 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
Radeon HD 4830 512MB 95 Watts
Difference: 40 Watts (73%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7750 should perform much faster than the Radeon HD 4830 512MB in general. (explain)

Radeon HD 7750 72000 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 14400 (25%)

Texel Rate

The Radeon HD 7750 is a lot (more or less 39%) more effective at anisotropic filtering than the Radeon HD 4830 512MB. (explain)

Radeon HD 7750 25600 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 7200 (39%)

Pixel Rate

The Radeon HD 7750 will be a lot (about 39%) faster with regards to AA than the Radeon HD 4830 512MB, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 7750 12800 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 3600 (39%)

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 7750

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 7750
Manufacturer AMD AMD
Year Oct 21, 2008 February 2012
Code Name RV770 LE Cape Verde Pro
Memory 512 MB 1024 MB
Core Speed 575 MHz 800 MHz
Memory Speed 1800 MHz 4500 MHz
Power (Max TDP) 95 watts 55 watts
Bandwidth 57600 MB/sec 72000 MB/sec
Texel Rate 18400 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 640(128x5) 512
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 956 million 1500 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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

Display Prices

Hide Prices

Radeon HD 4830 512MB

Amazon.com

Check prices at:

Radeon HD 7750

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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