GeForce GTX 660 vs Radeon HD 6750 1GB

Intro

Compare those specs to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has set the core frequency at 725 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this specific model. It features 720 SPUs as well as 36 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
GeForce GTX 660		140 Watts
	Difference: 54 Watts (63%)

Memory Bandwidth

In theory, the GeForce GTX 660 should be much faster than the Radeon HD 6750 1GB overall. (explain)

GeForce GTX 660		144192 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 80192 (125%)

Texel Rate

The GeForce GTX 660 will be much (approximately 200%) better at anisotropic filtering than the Radeon HD 6750 1GB. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 52300 (200%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 660 is superior to the Radeon HD 6750 1GB, by far. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 11920 (103%)

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 maximum amount of information (in units of MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.