GeForce GTX 295 vs GeForce GTX 850M

Intro

Compare all that to the GeForce GTX 850M, which comes with a core clock frequency of 876 MHz and a DDR3 memory frequency of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTX 295		289 Watts
	Difference: 249 Watts (623%)

Memory Bandwidth

Performance-wise, the GeForce GTX 295 should in theory be a lot better than the GeForce GTX 850M overall. (explain)

GeForce GTX 295		223776 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 191776 (599%)

Texel Rate

The GeForce GTX 295 should be quite a bit (approximately 163%) faster with regards to AF than the GeForce GTX 850M. (explain)

GeForce GTX 295		92160 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 57120 (163%)

Pixel Rate

The GeForce GTX 295 will be a lot (more or less 130%) faster with regards to anti-aliasing than the GeForce GTX 850M, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 295		32256 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 18240 (130%)

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 (in units of megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR 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 calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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