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Radeon HD 4830 1GB vs Radeon HD 6750

Intro

The Radeon HD 4830 1GB features a GPU core clock speed of 575 MHz, and the 1024 MB of GDDR4 RAM runs at 900 MHz through a 256-bit bus. It also is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare all that to the Radeon HD 6750, which features core clock speeds of 725 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 RAM. It features 720 SPUs as well as 36 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the Radeon HD 6750 should perform a little bit faster than the Radeon HD 4830 1GB in general. (explain)

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

Texel Rate

The Radeon HD 6750 should be much (more or less 42%) more effective at AF than the Radeon HD 4830 1GB. (explain)

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

Pixel Rate

The Radeon HD 6750 will be a lot (more or less 26%) more effective at AA than the Radeon HD 4830 1GB, and should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 6750 11600 Mpixels/sec
Radeon HD 4830 1GB 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 1GB

Amazon.com

Check prices at:

Radeon HD 6750

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 6750
Manufacturer AMD AMD
Year Oct 21, 2008 January 2011
Code Name RV770 LE Juniper Pro
Memory 1024 MB 512 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 GDDR4 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 4.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 amount of pixels the video card can possibly write to the 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 speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4830 1GB

Amazon.com

Check prices at:

Radeon HD 6750

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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