GeForce GTX 580 3GB vs Radeon HD 6770

Intro

Compare that to the Radeon HD 6770, which features core speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 memory. It features 800 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 136 Watts (126%)

Memory Bandwidth

Performance-wise, the GeForce GTX 580 3GB should in theory be much better than the Radeon HD 6770 in general. (explain)

GeForce GTX 580 3GB		192384 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 125184 (186%)

Texel Rate

The GeForce GTX 580 3GB will be a lot (approximately 37%) more effective at anisotropic filtering than the Radeon HD 6770. (explain)

GeForce GTX 580 3GB		49408 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 13408 (37%)

Pixel Rate

The GeForce GTX 580 3GB will be a lot (more or less 157%) faster with regards to anti-aliasing than the Radeon HD 6770, and also capable of handling higher resolutions better. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 22656 (157%)

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 information (counted in megabytes per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.