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Radeon HD 3470 256MB vs Radeon HD 6750

Intro

The Radeon HD 3470 256MB comes with a GPU 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 made up of 40(8x5) Stream Processors, 4 Texture Address Units, and 4 Raster Operation Units.

Compare that to the Radeon HD 6750, which features clock speeds of 725 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 memory. It features 720 SPUs as well as 36 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 6750 should be a lot faster than the Radeon HD 3470 256MB overall. (explain)

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

Texel Rate

The Radeon HD 6750 should be quite a bit (approximately 716%) better at texture filtering than the Radeon HD 3470 256MB. (explain)

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

Pixel Rate

The Radeon HD 6750 is a lot (about 263%) faster with regards to AA than the Radeon HD 3470 256MB, and able to handle higher resolutions better. (explain)

Radeon HD 6750 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

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
Manufacturer AMD AMD
Year 2008 January 2011
Code Name RV620 PRO Juniper Pro
Memory 256 MB 512 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 4.0

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 3470 256MB

Amazon.com

Check prices at:

Radeon HD 6750

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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