Geforce GTX 680 vs Radeon HD 6750

Intro

Compare those specs to the Radeon HD 6750, which features clock speeds of 725 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 RAM. It features 720 SPUs as well as 36 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Geforce GTX 680		195 Watts
	Difference: 109 Watts (127%)

Memory Bandwidth

In theory, the Geforce GTX 680 should be 200% quicker than the Radeon HD 6750 overall, due to its greater bandwidth. (explain)

Geforce GTX 680		192256 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 128256 (200%)

Texel Rate

The Geforce GTX 680 is much (approximately 393%) faster with regards to AF than the Radeon HD 6750. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 102668 (393%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 680 is a better choice, by a large margin. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 20592 (178%)

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 data (measured in megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number of texture units by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.