GeForce GTX 470 vs GeForce GTX 870M

Intro

Compare all of that to the GeForce GTX 870M, which has core speeds of 941 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 RAM. It features 1344 SPUs as well as 112 Texture Address Units and 24 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

GeForce GTX 870M		4770 points
GeForce GTX 470		2937 points
	Difference: 1833 (62%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
GeForce GTX 470		215 Watts
	Difference: 105 Watts (95%)

Memory Bandwidth

The GeForce GTX 470, in theory, should be much faster than the GeForce GTX 870M overall. (explain)

GeForce GTX 470		133920 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 37920 (40%)

Texel Rate

The GeForce GTX 870M is much (more or less 210%) more effective at texture filtering than the GeForce GTX 470. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 71400 (210%)

Pixel Rate

The GeForce GTX 470 is just a bit (approximately 8%) better at anti-aliasing than the GeForce GTX 870M, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 1696 (8%)

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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

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