Radeon HD 6750 1GB vs Radeon HD 7850

Intro

Compare all of that to the Radeon HD 7850, which comes with a GPU core clock speed of 860 MHz, and 2048 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also is comprised of 1024 SPUs, 64 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		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 a lot better than the Radeon HD 6750 1GB overall. (explain)

Radeon HD 7850		153600 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 89600 (140%)

Texel Rate

The Radeon HD 7850 is quite a bit (about 111%) faster with regards to texture filtering than the Radeon HD 6750 1GB. (explain)

Radeon HD 7850		55040 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 28940 (111%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7850 is superior to the Radeon HD 6750 1GB, by far. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon HD 6750 1GB		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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the 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 most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.