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Radeon HD 4730 vs Radeon HD 4750

Intro

The Radeon HD 4730 features a core clock speed of 700 MHz and a GDDR5 memory speed of 900 MHz. It also features a 128-bit memory bus, and makes use of a 55 nm design. It is made up of 640(128x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Compare those specifications to the Radeon HD 4750, which has core 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 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750 75 Watts
Radeon HD 4730 140 Watts
Difference: 65 Watts (87%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4730 should in theory be a small bit better than the Radeon HD 4750 in general. (explain)

Radeon HD 4730 57600 MB/sec
Radeon HD 4750 51200 MB/sec
Difference: 6400 (13%)

Texel Rate

The Radeon HD 4750 will be a small bit (approximately 4%) more effective at AF than the Radeon HD 4730. (explain)

Radeon HD 4750 23360 Mtexels/sec
Radeon HD 4730 22400 Mtexels/sec
Difference: 960 (4%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4750 is a better choice, by a large margin. (explain)

Radeon HD 4750 11680 Mpixels/sec
Radeon HD 4730 5600 Mpixels/sec
Difference: 6080 (109%)

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 4730

Amazon.com

Check prices at:

Radeon HD 4750

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 4730 Radeon HD 4750
Manufacturer AMD AMD
Year Jun 8, 2009
Code Name RV770/CE RV740
Memory 512 MB 512 MB
Core Speed 700 MHz 730 MHz
Memory Speed 3600 MHz 3200 MHz
Power (Max TDP) 140 watts 75 watts
Bandwidth 57600 MB/sec 51200 MB/sec
Texel Rate 22400 Mtexels/sec 23360 Mtexels/sec
Pixel Rate 5600 Mpixels/sec 11680 Mpixels/sec
Unified Shaders 640(128x5) 640(128x5)
Texture Mapping Units 32 32
Render Output Units 8 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 40 nm
Transistors 956 million 826 million
Bus PCIe 2.0 x16 PCIe 2.0 x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 4730

Amazon.com

Check prices at:

Radeon HD 4750

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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