GeForce GTX 295 vs GeForce GTX 970M

Intro

Compare all of that to the GeForce GTX 970M, which makes use of a 28 nm design. nVidia has set the core frequency at 924 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this model. It features 1280 SPUs as well as 80 Texture Address Units and 48 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970M		75 Watts
GeForce GTX 295		289 Watts
	Difference: 214 Watts (285%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 295 should theoretically be much better than the GeForce GTX 970M in general. (explain)

GeForce GTX 295		223776 MB/sec
GeForce GTX 970M		96000 MB/sec
	Difference: 127776 (133%)

Texel Rate

The GeForce GTX 295 should be much (more or less 25%) more effective at texture filtering than the GeForce GTX 970M. (explain)

GeForce GTX 295		92160 Mtexels/sec
GeForce GTX 970M		73920 Mtexels/sec
	Difference: 18240 (25%)

Pixel Rate

The GeForce GTX 970M will be much (about 38%) faster with regards to full screen anti-aliasing than the GeForce GTX 295, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 970M		44352 Mpixels/sec
GeForce GTX 295		32256 Mpixels/sec
	Difference: 12096 (38%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.