GeForce GTX 580 3GB vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which features GPU clock speed of 850 MHz, and 1024 MB of GDDR5 RAM set to run at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 136 Watts (126%)

Memory Bandwidth

Performance-wise, the GeForce GTX 580 3GB should theoretically be a lot better than the Radeon HD 5770 overall. (explain)

GeForce GTX 580 3GB		192384 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 115584 (151%)

Texel Rate

The GeForce GTX 580 3GB is a lot (approximately 45%) better at texture filtering than the Radeon HD 5770. (explain)

GeForce GTX 580 3GB		49408 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 15408 (45%)

Pixel Rate

The GeForce GTX 580 3GB will be a lot (about 172%) better at AA than the Radeon HD 5770, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 23456 (172%)

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 max amount of data (measured in MB per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's 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 is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.