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Radeon HD 3470 512MB vs Radeon HD 4670 512MB

Intro

The Radeon HD 3470 512MB comes with a GPU core clock speed of 800 MHz, and the 512 MB of GDDR3 RAM runs at 950 MHz through a 128-bit bus. It also is comprised of 40(8x5) Stream Processors, 4 TAUs, and 4 ROPs.

Compare all that to the Radeon HD 4670 512MB, which features core speeds of 750 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR4/GDDR3/DDR3/DDR2 RAM. It features 320(64x5) SPUs along with 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 a small 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 should be much (about 650%) better at anisotropic filtering 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

If running with a high screen resolution is important to you, then the Radeon HD 4670 512MB is a better choice, and very much so. (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

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Radeon HD 4670 512MB

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 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 maximum amount of data (in units of megabytes per second) that can be transported across 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 should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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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.

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