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Radeon HD 3470 256MB vs Radeon HD 7750

Intro

The Radeon HD 3470 256MB has a GPU core clock speed of 800 MHz, and the 256 MB of DDR2 RAM runs at 950 MHz through a 128-bit bus. It also features 40(8x5) SPUs, 4 Texture Address Units, and 4 ROPs.

Compare those specs to the Radeon HD 7750, which comes with clock speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 512 SPUs as well as 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 7750 will be 137% quicker than the Radeon HD 3470 256MB overall, because of its higher data rate. (explain)

Radeon HD 7750 72000 MB/sec
Radeon HD 3470 256MB 30400 MB/sec
Difference: 41600 (137%)

Texel Rate

The Radeon HD 7750 is a lot (more or less 700%) better at AF than the Radeon HD 3470 256MB. (explain)

Radeon HD 7750 25600 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 22400 (700%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7750 is superior to the Radeon HD 3470 256MB, by a large margin. (explain)

Radeon HD 7750 12800 Mpixels/sec
Radeon HD 3470 256MB 3200 Mpixels/sec
Difference: 9600 (300%)

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 3470 256MB

Amazon.com

Check prices at:

Radeon HD 7750

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 3470 256MB Radeon HD 7750
Manufacturer AMD AMD
Year 2008 February 2012
Code Name RV620 PRO Cape Verde Pro
Memory 256 MB 1024 MB
Core Speed 800 MHz 800 MHz
Memory Speed 1900 MHz 4500 MHz
Power (Max TDP) (Unknown) watts 55 watts
Bandwidth 30400 MB/sec 72000 MB/sec
Texel Rate 3200 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 3200 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 40(8x5) 512
Texture Mapping Units 4 32
Render Output Units 4 16
Bus Type DDR2 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) million 1500 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 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 anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 3470 256MB

Amazon.com

Check prices at:

Radeon HD 7750

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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