Geforce GTX 680 vs Radeon HD 6750

Intro

Compare those specs to the Radeon HD 6750, which comes with a clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 720 SPUs, 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

Performance-wise, the Geforce GTX 680 should theoretically be quite a bit superior to the Radeon HD 6750 in general. (explain)

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

Texel Rate

The Geforce GTX 680 is quite a bit (approximately 393%) more effective at texture filtering than the Radeon HD 6750. (explain)

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

Pixel Rate

The Geforce GTX 680 should be a lot (more or less 178%) more effective at FSAA than the Radeon HD 6750, and capable of handling higher screen resolutions better. (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 largest amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 amount of texture map elements (texels) that can be 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 this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of 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 output rate is also dependant 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.