GeForce GTX 580 3GB vs Radeon HD 6750

Intro

Compare those specs to the Radeon HD 6750, which has a GPU core clock speed of 725 MHz, and 512 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also is comprised of 720 Stream Processors, 36 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 158 Watts (184%)

Memory Bandwidth

The GeForce GTX 580 3GB, in theory, should be quite a bit faster than the Radeon HD 6750 in general. (explain)

GeForce GTX 580 3GB		192384 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 128384 (201%)

Texel Rate

The GeForce GTX 580 3GB is quite a bit (approximately 89%) faster with regards to texture filtering than the Radeon HD 6750. (explain)

GeForce GTX 580 3GB		49408 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 23308 (89%)

Pixel Rate

The GeForce GTX 580 3GB will be much (approximately 219%) better at AA than the Radeon HD 6750, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 25456 (219%)

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 transported past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video 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 that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core 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 rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.