GeForce GTX 295 vs GeForce GTX 880M

Intro

Compare all that to the GeForce GTX 880M, which makes use of a 28 nm design. nVidia has set the core speed at 954 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this card. It features 1536 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
GeForce GTX 295		289 Watts
	Difference: 159 Watts (122%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 295 should theoretically be much better than the GeForce GTX 880M overall. (explain)

GeForce GTX 295		223776 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 95776 (75%)

Texel Rate

The GeForce GTX 880M is a lot (approximately 33%) faster with regards to texture filtering than the GeForce GTX 295. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GTX 295		92160 Mtexels/sec
	Difference: 29952 (33%)

Pixel Rate

The GeForce GTX 295 will be a little bit (approximately 6%) faster with regards to full screen anti-aliasing than the GeForce GTX 880M, and also should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 295		32256 Mpixels/sec
GeForce GTX 880M		30528 Mpixels/sec
	Difference: 1728 (6%)

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 data (measured in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.