Radeon HD 6750 vs Radeon HD 7850

Intro

Compare those specs to the Radeon HD 7850, which comes with GPU clock speed of 860 MHz, and 2048 MB of GDDR5 memory set to run at 1200 MHz through a 256-bit bus. It also features 1024 Stream Processors, 64 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 7850		130 Watts
	Difference: 44 Watts (51%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7850 should in theory be quite a bit superior to the Radeon HD 6750 in general. (explain)

Radeon HD 7850		153600 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 89600 (140%)

Texel Rate

The Radeon HD 7850 should be quite a bit (more or less 111%) better at texture filtering than the Radeon HD 6750. (explain)

Radeon HD 7850		55040 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 28940 (111%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7850 is the winner, by a large margin. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 15920 (137%)

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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.