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Radeon HD 3470 512MB vs Radeon HD 6770 1GB

Intro

The Radeon HD 3470 512MB makes use of a 55 nm design. AMD has clocked the core speed at 800 MHz. The GDDR3 memory works at a frequency of 950 MHz on this particular card. It features 40(8x5) SPUs as well as 4 TAUs and 4 ROPs.

Compare those specifications to the Radeon HD 6770 1GB, which features core speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 6770 1GB should theoretically perform much faster than the Radeon HD 3470 512MB overall. (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 will be quite a bit (about 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

If running with a high resolution is important to you, then the Radeon HD 6770 1GB is a better choice, by a large margin. (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

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.

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 (in units of megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better 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 number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach 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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