Radeon HD 6750 vs Radeon HD 7950

Intro

Compare those specifications to the Radeon HD 7950, which has a clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 384-bit memory bus, and uses a 28 nm design. It features 1792 SPUs, 112 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 7950		200 Watts
	Difference: 114 Watts (133%)

Memory Bandwidth

Performance-wise, the Radeon HD 7950 should in theory be a lot superior to the Radeon HD 6750 overall. (explain)

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

Texel Rate

The Radeon HD 7950 will be a lot (approximately 243%) better at texture 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 using a high resolution is important to you, then the Radeon HD 7950 is superior to the Radeon HD 6750, by a large margin. (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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.