GeForce GTX 880M vs Radeon HD 7870

Intro

Compare all of that to the Radeon HD 7870, which has core clock speeds of 1000 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 880M		6360 points
Radeon HD 7870		6230 points
	Difference: 130 (2%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
Radeon HD 7870		175 Watts
	Difference: 45 Watts (35%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7870 should theoretically be a bit superior to the GeForce GTX 880M overall. (explain)

Radeon HD 7870		153600 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 25600 (20%)

Texel Rate

The GeForce GTX 880M will be a lot (more or less 53%) better at texture filtering than the Radeon HD 7870. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 42112 (53%)

Pixel Rate

The Radeon HD 7870 is a bit (more or less 5%) faster with regards to FSAA than the GeForce GTX 880M, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 7870		32000 Mpixels/sec
GeForce GTX 880M		30528 Mpixels/sec
	Difference: 1472 (5%)

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 information (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.