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Radeon HD 3470 512MB vs Radeon HD 6770 1GB

Intro

The Radeon HD 3470 512MB comes with a GPU core speed of 800 MHz, and the 512 MB of GDDR3 memory is set to run at 950 MHz through a 128-bit bus. It also is made up of 40(8x5) SPUs, 4 Texture Address Units, and 4 Raster Operation Units.

Compare those specifications to the Radeon HD 6770 1GB, which uses a 40 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 RAM works at a speed of 1050 MHz on this specific model. It features 800 SPUs as well as 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 6770 1GB should theoretically be much superior to the Radeon HD 3470 512MB in general. (explain)

Radeon HD 6770 1GB 67200 MB/sec
Radeon HD 3470 512MB 30400 MB/sec
Difference: 36800 (121%)

Texel Rate

The Radeon HD 6770 1GB should be a lot (approximately 1025%) faster with regards to texture filtering than the Radeon HD 3470 512MB. (explain)

Radeon HD 6770 1GB 36000 Mtexels/sec
Radeon HD 3470 512MB 3200 Mtexels/sec
Difference: 32800 (1025%)

Pixel Rate

The Radeon HD 6770 1GB will be much (more or less 350%) more effective at AA than the Radeon HD 3470 512MB, and able to handle higher resolutions more effectively. (explain)

Radeon HD 6770 1GB 14400 Mpixels/sec
Radeon HD 3470 512MB 3200 Mpixels/sec
Difference: 11200 (350%)

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 512MB

Amazon.com

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Radeon HD 6770 1GB

Amazon.com

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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 512MB Radeon HD 6770 1GB
Manufacturer AMD AMD
Year 2008 January 2011
Code Name RV620 PRO Juniper XT
Memory 512 MB 1024 MB
Core Speed 800 MHz 900 MHz
Memory Speed 1900 MHz 4200 MHz
Power (Max TDP) (Unknown) watts 108 watts
Bandwidth 30400 MB/sec 67200 MB/sec
Texel Rate 3200 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 3200 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 40(8x5) 800
Texture Mapping Units 4 40
Render Output Units 4 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 1040 million
Bus PCIe 2.0 x16 PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of 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 in one 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 worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 potential to get to the maximum fill rate.

Display Prices

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Radeon HD 3470 512MB

Amazon.com

Check prices at:

Radeon HD 6770 1GB

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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