GeForce GTX 880M vs Radeon HD 5970

Intro

Compare those specifications to the Radeon HD 5970, which features a GPU core clock speed of 725 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 256-bit bus. It also is made up of 1600 SPUs, 160 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
Radeon HD 5970		294 Watts
	Difference: 164 Watts (126%)

Memory Bandwidth

In theory, the Radeon HD 5970 is 100% quicker than the GeForce GTX 880M overall, because of its greater bandwidth. (explain)

Radeon HD 5970		256000 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 128000 (100%)

Texel Rate

The Radeon HD 5970 will be much (about 90%) more effective at anisotropic filtering than the GeForce GTX 880M. (explain)

Radeon HD 5970		232000 Mtexels/sec
GeForce GTX 880M		122112 Mtexels/sec
	Difference: 109888 (90%)

Pixel Rate

The Radeon HD 5970 should be quite a bit (about 204%) more effective at full screen anti-aliasing than the GeForce GTX 880M, and also will be capable of handling higher resolutions better. (explain)

Radeon HD 5970		92800 Mpixels/sec
GeForce GTX 880M		30528 Mpixels/sec
	Difference: 62272 (204%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per 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 - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends 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.