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Radeon HD 3470 512MB vs Radeon HD 4670 512MB

Intro

The Radeon HD 3470 512MB makes use of a 55 nm design. AMD has set the core speed at 800 MHz. The GDDR3 memory runs at a speed of 950 MHz on this card. It features 40(8x5) SPUs along with 4 TAUs and 4 Rasterization Operator Units.

Compare all that to the Radeon HD 4670 512MB, which has GPU core speed of 750 MHz, and 512 MB of GDDR4/GDDR3/DDR3/DDR2 memory set to run at 1000 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 32 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 4670 512MB should theoretically be just a bit superior to the Radeon HD 3470 512MB overall. (explain)

Radeon HD 4670 512MB 32000 MB/sec
Radeon HD 3470 512MB 30400 MB/sec
Difference: 1600 (5%)

Texel Rate

The Radeon HD 4670 512MB will be a lot (more or less 650%) better at AF than the Radeon HD 3470 512MB. (explain)

Radeon HD 4670 512MB 24000 Mtexels/sec
Radeon HD 3470 512MB 3200 Mtexels/sec
Difference: 20800 (650%)

Pixel Rate

The Radeon HD 4670 512MB should be quite a bit (about 88%) better at AA than the Radeon HD 3470 512MB, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 4670 512MB 6000 Mpixels/sec
Radeon HD 3470 512MB 3200 Mpixels/sec
Difference: 2800 (88%)

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 4670 512MB

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 4670 512MB
Manufacturer AMD AMD
Year 2008 Sep 10, 2008
Code Name RV620 PRO RV730 XT
Memory 512 MB 512 MB
Core Speed 800 MHz 750 MHz
Memory Speed 1900 MHz 2000 MHz
Power (Max TDP) (Unknown) watts 70 watts
Bandwidth 30400 MB/sec 32000 MB/sec
Texel Rate 3200 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 3200 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 40(8x5) 320(64x5)
Texture Mapping Units 4 32
Render Output Units 4 8
Bus Type GDDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 128-bit 128-bit
Fab Process 55 nm 55 nm
Transistors (Unknown) million 514 million
Bus PCIe 2.0 x16 PCIe 2.0 x16, AGP 8x
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 information (counted in megabytes per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 can be processed in one second. This number is worked out by multiplying the total texture units by the core clock 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 processed in one second.

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

Display Prices

Hide Prices

Radeon HD 3470 512MB

Amazon.com

Check prices at:

Radeon HD 4670 512MB

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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