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Radeon HD 4750 vs Radeon HD 5670

Intro

The Radeon HD 4750 has core clock speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 ROPs.

Compare all of that to the Radeon HD 5670, which has GPU core speed of 775 MHz, and 1024 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also is comprised of 400(80x5) Stream Processors, 20 Texture Address Units, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
Radeon HD 4750 75 Watts
Difference: 14 Watts (23%)

Memory Bandwidth

Theoretically, the Radeon HD 5670 should perform a lot faster than the Radeon HD 4750 overall. (explain)

Radeon HD 5670 64000 MB/sec
Radeon HD 4750 51200 MB/sec
Difference: 12800 (25%)

Texel Rate

The Radeon HD 4750 should be quite a bit (more or less 51%) faster with regards to anisotropic filtering than the Radeon HD 5670. (explain)

Radeon HD 4750 23360 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 7860 (51%)

Pixel Rate

The Radeon HD 4750 will be a lot (about 88%) faster with regards to FSAA than the Radeon HD 5670, and will be able to handle higher resolutions more effectively. (explain)

Radeon HD 4750 11680 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 5480 (88%)

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 4750

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 4750 Radeon HD 5670
Manufacturer AMD AMD
Year January 14, 2010
Code Name RV740 Redwood XT
Memory 512 MB 1024 MB
Core Speed 730 MHz 775 MHz
Memory Speed 3200 MHz 4000 MHz
Power (Max TDP) 75 watts 61 watts
Bandwidth 51200 MB/sec 64000 MB/sec
Texel Rate 23360 Mtexels/sec 15500 Mtexels/sec
Pixel Rate 11680 Mpixels/sec 6200 Mpixels/sec
Unified Shaders 640(128x5) 400(80x5)
Texture Mapping Units 32 20
Render Output Units 16 8
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 826 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 maximum amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 amount of texture map elements (texels) that are processed per second. This is calculated 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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

Display Prices

Hide Prices

Radeon HD 4750

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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