GeForce GTX 295 vs GeForce GTX 870M

Intro

Compare those specifications to the GeForce GTX 870M, which comes with GPU core speed of 941 MHz, and 3072 MB of GDDR5 memory running at 1000 MHz through a 192-bit bus. It also is made up of 1344 SPUs, 112 Texture Address Units, 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 295		289 Watts
	Difference: 179 Watts (163%)

Memory Bandwidth

In theory, the GeForce GTX 295 should perform quite a bit faster than the GeForce GTX 870M in general. (explain)

GeForce GTX 295		223776 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 127776 (133%)

Texel Rate

The GeForce GTX 870M is a bit (approximately 14%) more effective at anisotropic filtering than the GeForce GTX 295. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GTX 295		92160 Mtexels/sec
	Difference: 13232 (14%)

Pixel Rate

The GeForce GTX 295 is a lot (about 43%) faster with regards to AA than the GeForce GTX 870M, and able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 295		32256 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 9672 (43%)

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: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.