GeForce GTX 880M vs Radeon HD 5870

Intro

Compare that to the Radeon HD 5870, which has core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 1600(320x5) SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
Radeon HD 5870		188 Watts
	Difference: 58 Watts (45%)

Memory Bandwidth

Performance-wise, the Radeon HD 5870 should in theory be just a bit superior to the GeForce GTX 880M overall. (explain)

Radeon HD 5870		153600 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 25600 (20%)

Texel Rate

The GeForce GTX 880M will be quite a bit (about 80%) better at texture filtering than the Radeon HD 5870. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 5870		68000 Mtexels/sec
	Difference: 54112 (80%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 880M is the winner, though only just barely. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 5870		27200 Mpixels/sec
	Difference: 3328 (12%)

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 (in units of MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 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 AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.