GeForce GTX 260 Core 216 vs GeForce GTX 870M

Intro

Compare that to the GeForce GTX 870M, which has GPU clock speed of 941 MHz, and 3072 MB of GDDR5 memory set to run at 1000 MHz through a 192-bit bus. It also is made up of 1344 Stream Processors, 112 TAUs, and 24 Raster Operation 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

Theoretically speaking, the GeForce GTX 260 Core 216 should be 17% faster than the GeForce GTX 870M overall, due to its higher data rate. (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 (about 154%) faster with regards to texture filtering 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

If using high levels of AA is important to you, then the GeForce GTX 870M is superior to the GeForce GTX 260 Core 216, by far. (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 max amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. 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 can be applied in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the 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 clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.