Radeon HD 6750 vs Radeon HD 7950

Intro

Compare all of that to the Radeon HD 7950, which has core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1536 MB of GDDR5 RAM. It features 1792 SPUs along with 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 7950		200 Watts
	Difference: 114 Watts (133%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 is 275% quicker than the Radeon HD 6750 in general, due to its higher data rate. (explain)

Radeon HD 7950		240000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 176000 (275%)

Texel Rate

The Radeon HD 7950 is a lot (more or less 243%) better at anisotropic filtering than the Radeon HD 6750. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 63500 (243%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7950 is a better choice, and very much so. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 14000 (121%)

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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the 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 that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.