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Radeon HD 3470 256MB vs Radeon HD 6750 1GB

Intro

The Radeon HD 3470 256MB comes with a GPU core clock speed of 800 MHz, and the 256 MB of DDR2 memory is set to run at 950 MHz through a 128-bit bus. It also is comprised of 40(8x5) SPUs, 4 TAUs, and 4 Raster Operation Units.

Compare those specifications to the Radeon HD 6750 1GB, which features a core clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is made up of 720 SPUs, 36 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 6750 1GB, in theory, should be quite a bit faster than the Radeon HD 3470 256MB in general. (explain)

Radeon HD 6750 1GB 64000 MB/sec
Radeon HD 3470 256MB 30400 MB/sec
Difference: 33600 (111%)

Texel Rate

The Radeon HD 6750 1GB should be a lot (approximately 716%) better at AF than the Radeon HD 3470 256MB. (explain)

Radeon HD 6750 1GB 26100 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 22900 (716%)

Pixel Rate

The Radeon HD 6750 1GB is quite a bit (about 263%) better at FSAA than the Radeon HD 3470 256MB, and also able to handle higher resolutions better. (explain)

Radeon HD 6750 1GB 11600 Mpixels/sec
Radeon HD 3470 256MB 3200 Mpixels/sec
Difference: 8400 (263%)

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 6750 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 6750 1GB
Manufacturer AMD AMD
Year 2008 January 2011
Code Name RV620 PRO Juniper Pro
Memory 256 MB 1024 MB
Core Speed 800 MHz 725 MHz
Memory Speed 1900 MHz 4000 MHz
Power (Max TDP) (Unknown) watts 86 watts
Bandwidth 30400 MB/sec 64000 MB/sec
Texel Rate 3200 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 3200 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 40(8x5) 720
Texture Mapping Units 4 36
Render Output Units 4 16
Bus Type DDR2 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: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 3470 256MB

Amazon.com

Check prices at:

Radeon HD 6750 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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