GeForce GTX 260 Core 216 vs GeForce GTX 870M

Intro

Compare those specifications to the GeForce GTX 870M, which features core speeds of 941 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 memory. 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 Core 216		202 Watts
	Difference: 92 Watts (84%)

Memory Bandwidth

In theory, the GeForce GTX 260 Core 216 should perform just a bit faster than the GeForce GTX 870M in general. (explain)

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

Texel Rate

The GeForce GTX 870M is a lot (more or less 154%) faster with regards to AF than the GeForce GTX 260 Core 216. (explain)

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

Pixel Rate

The GeForce GTX 870M is quite a bit (more or less 40%) better at anti-aliasing than the GeForce GTX 260 Core 216, and should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GTX 260 Core 216		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 maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per 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 higher this number, the better the graphics 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 maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.