Radeon HD 3470 256MB vs Radeon HD 6750 1GB

Intro

Compare all that to the Radeon HD 6750 1GB, which comes with core clock speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 720 SPUs along with 36 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 6750 1GB should be a lot 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 quite a bit (about 716%) more effective 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

If using a high screen resolution is important to you, then the Radeon HD 6750 1GB is the winner, by far. (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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one 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 filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.