GeForce GTX 260 216SP 55 nm vs GeForce GTX 970M

Intro

Compare those specs to the GeForce GTX 970M, which has a clock frequency of 924 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 192-bit memory bus, and uses a 28 nm design. It is comprised of 1280 SPUs, 80 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970M		75 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 96 Watts (128%)

Memory Bandwidth

The GeForce GTX 260 216SP 55 nm should in theory be a little bit faster than the GeForce GTX 970M in general. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
GeForce GTX 970M		96000 MB/sec
	Difference: 15888 (17%)

Texel Rate

The GeForce GTX 970M will be quite a bit (approximately 78%) better at texture filtering than the GeForce GTX 260 216SP 55 nm. (explain)

GeForce GTX 970M		73920 Mtexels/sec
GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
	Difference: 32448 (78%)

Pixel Rate

The GeForce GTX 970M should be a lot (about 175%) better at full screen anti-aliasing than the GeForce GTX 260 216SP 55 nm, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 970M		44352 Mpixels/sec
GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
	Difference: 28224 (175%)

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 (in units of MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.