GeForce GTX 260 216SP 55 nm vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which features clock 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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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 61 Watts (55%)

Memory Bandwidth

The GeForce GTX 260 216SP 55 nm should theoretically perform just a bit faster than the GeForce GTX 870M in general. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 15888 (17%)

Texel Rate

The GeForce GTX 870M will be a lot (about 154%) faster with regards to texture filtering than the GeForce GTX 260 216SP 55 nm. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
	Difference: 63920 (154%)

Pixel Rate

The GeForce GTX 870M is quite a bit (more or less 40%) faster with regards to FSAA than the GeForce GTX 260 216SP 55 nm, and will be capable of handling higher resolutions better. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
	Difference: 6456 (40%)

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 MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, 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 number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.