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Radeon HD 3470 512MB vs Radeon HD 4670 1GB

Intro

The Radeon HD 3470 512MB features core speeds of 800 MHz on the GPU, and 950 MHz on the 512 MB of GDDR3 memory. It features 40(8x5) SPUs as well as 4 Texture Address Units and 4 ROPs.

Compare that to the Radeon HD 4670 1GB, which uses a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 RAM runs at a speed of 1100 MHz on this specific model. It features 320(64x5) SPUs as well as 32 TAUs and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 4670 1GB should theoretically be a little bit better than the Radeon HD 3470 512MB overall. (explain)

Radeon HD 4670 1GB 35200 MB/sec
Radeon HD 3470 512MB 30400 MB/sec
Difference: 4800 (16%)

Texel Rate

The Radeon HD 4670 1GB will be much (more or less 650%) better at AF than the Radeon HD 3470 512MB. (explain)

Radeon HD 4670 1GB 24000 Mtexels/sec
Radeon HD 3470 512MB 3200 Mtexels/sec
Difference: 20800 (650%)

Pixel Rate

The Radeon HD 4670 1GB will be quite a bit (about 88%) more effective at anti-aliasing than the Radeon HD 3470 512MB, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 4670 1GB 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 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 4670 1GB
Manufacturer AMD AMD
Year 2008 Sep 10, 2008
Code Name RV620 PRO RV730 XT
Memory 512 MB 1024 MB
Core Speed 800 MHz 750 MHz
Memory Speed 1900 MHz 2200 MHz
Power (Max TDP) (Unknown) watts 70 watts
Bandwidth 30400 MB/sec 35200 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: Bandwidth is the largest amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the 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 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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