GeForce GTX 880M vs Radeon HD 6870

Intro

Compare those specs to the Radeon HD 6870, which comes with GPU clock speed of 900 MHz, and 1024 MB of GDDR5 RAM set to run at 1050 MHz through a 256-bit bus. It also is made up of 1120 SPUs, 56 TAUs, 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 6870		2870 points
	Difference: 3490 (122%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
Radeon HD 6870		151 Watts
	Difference: 21 Watts (16%)

Memory Bandwidth

In theory, the Radeon HD 6870 should perform a little bit faster than the GeForce GTX 880M in general. (explain)

Radeon HD 6870		134400 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 6400 (5%)

Texel Rate

The GeForce GTX 880M is a lot (more or less 142%) better at texture filtering than the Radeon HD 6870. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 6870		50400 Mtexels/sec
	Difference: 71712 (142%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 880M is a better choice, but it probably won't make a huge difference. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 6870		28800 Mpixels/sec
	Difference: 1728 (6%)

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 maximum amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 maximum amount of pixels the video card can possibly record to its 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 card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.