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Radeon HD 4750 vs Radeon HD 5670

Intro

The Radeon HD 4750 has a GPU clock speed of 730 MHz, and the 512 MB of GDDR5 RAM runs at 800 MHz through a 128-bit bus. It also is made up of 640(128x5) Stream Processors, 32 TAUs, and 16 ROPs.

Compare all that to the Radeon HD 5670, which uses a 40 nm design. AMD has clocked the core frequency at 775 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this particular model. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 ROPs.

Display Graphs

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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

In theory, the Radeon HD 5670 should perform much faster than the Radeon HD 4750 in general. (explain)

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

Texel Rate

The Radeon HD 4750 is a lot (more or less 51%) faster with regards to texture 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 should be a lot (about 88%) faster with regards to anti-aliasing than the Radeon HD 5670, and will be able to handle higher screen 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 largest amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability 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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