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Radeon HD 4730 vs Radeon HD 4770

Intro

The Radeon HD 4730 comes with core clock speeds of 700 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 TAUs and 8 ROPs.

Compare all that to the Radeon HD 4770, which has core clock speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770 80 Watts
Radeon HD 4730 140 Watts
Difference: 60 Watts (75%)

Memory Bandwidth

Performance-wise, the Radeon HD 4730 should in theory be a small bit superior to the Radeon HD 4770 in general. (explain)

Radeon HD 4730 57600 MB/sec
Radeon HD 4770 51200 MB/sec
Difference: 6400 (13%)

Texel Rate

The Radeon HD 4770 should be a little bit (more or less 7%) better at anisotropic filtering than the Radeon HD 4730. (explain)

Radeon HD 4770 24000 Mtexels/sec
Radeon HD 4730 22400 Mtexels/sec
Difference: 1600 (7%)

Pixel Rate

The Radeon HD 4770 is a lot (approximately 114%) faster with regards to AA than the Radeon HD 4730, and should be capable of handling higher resolutions better. (explain)

Radeon HD 4770 12000 Mpixels/sec
Radeon HD 4730 5600 Mpixels/sec
Difference: 6400 (114%)

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 4770

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 4770
Manufacturer AMD AMD
Year Jun 8, 2009 Apr 28, 2009
Code Name RV770/CE RV740
Memory 512 MB 512 MB
Core Speed 700 MHz 750 MHz
Memory Speed 3600 MHz 3200 MHz
Power (Max TDP) 140 watts 80 watts
Bandwidth 57600 MB/sec 51200 MB/sec
Texel Rate 22400 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 5600 Mpixels/sec 12000 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 maximum amount of data (counted in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4730

Amazon.com

Check prices at:

Radeon HD 4770

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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