GeForce GTX 880M vs Radeon HD 7870 XT

Intro

Compare all that to the Radeon HD 7870 XT, which makes use of a 28 nm design. AMD has clocked the core frequency at 925 MHz. The GDDR5 RAM is set to run at a speed of 1500 MHz on this particular model. It features 1536 SPUs along with 96 TAUs and 32 Rasterization Operator Units.

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

Radeon HD 7870 XT		6390 points
GeForce GTX 880M		6360 points
	Difference: 30 (0%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
Radeon HD 7870 XT		185 Watts
	Difference: 55 Watts (42%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7870 XT should perform a lot faster than the GeForce GTX 880M in general. (explain)

Radeon HD 7870 XT		192000 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 64000 (50%)

Texel Rate

The GeForce GTX 880M is much (approximately 38%) faster with regards to AF than the Radeon HD 7870 XT. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 33312 (38%)

Pixel Rate

The GeForce GTX 880M is a bit (more or less 3%) more effective at FSAA than the Radeon HD 7870 XT, and capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 928 (3%)

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 largest amount of information (measured in MB per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.