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Radeon HD 3470 256MB vs Radeon HD 4670 1GB

Intro

The Radeon HD 3470 256MB makes use of a 55 nm design. AMD has clocked the core speed at 800 MHz. The DDR2 memory is set to run at a speed of 950 MHz on this model. It features 40(8x5) SPUs along with 4 Texture Address Units and 4 ROPs.

Compare those specs to the Radeon HD 4670 1GB, which has GPU clock speed of 750 MHz, and 1024 MB of GDDR4/GDDR3/DDR3/DDR2 memory set to run at 1100 MHz through a 128-bit bus. It also is made up of 320(64x5) SPUs, 32 TAUs, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4670 1GB should perform a little bit faster than the Radeon HD 3470 256MB overall. (explain)

Radeon HD 4670 1GB 35200 MB/sec
Radeon HD 3470 256MB 30400 MB/sec
Difference: 4800 (16%)

Texel Rate

The Radeon HD 4670 1GB will be quite a bit (more or less 650%) more effective at anisotropic filtering than the Radeon HD 3470 256MB. (explain)

Radeon HD 4670 1GB 24000 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 20800 (650%)

Pixel Rate

The Radeon HD 4670 1GB is much (about 88%) faster with regards to full screen anti-aliasing than the Radeon HD 3470 256MB, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4670 1GB 6000 Mpixels/sec
Radeon HD 3470 256MB 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 256MB

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 256MB Radeon HD 4670 1GB
Manufacturer AMD AMD
Year 2008 Sep 10, 2008
Code Name RV620 PRO RV730 XT
Memory 256 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 DDR2 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 information (in units of megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3470 256MB

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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