GeForce GTX 850M vs GeForce GTX 880M

Intro

Compare all of that to the GeForce GTX 880M, which makes use of a 28 nm design. nVidia has clocked the core frequency at 954 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this particular model. It features 1536 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 880M		6360 points
GeForce GTX 850M		3340 points
	Difference: 3020 (90%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTX 880M		130 Watts
	Difference: 90 Watts (225%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 880M should in theory be a lot better than the GeForce GTX 850M overall. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 96000 (300%)

Texel Rate

The GeForce GTX 880M is much (about 248%) more effective at AF than the GeForce GTX 850M. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 87072 (248%)

Pixel Rate

The GeForce GTX 880M should be a lot (approximately 118%) more effective at full screen anti-aliasing than the GeForce GTX 850M, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 16512 (118%)

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 data (in units of MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics 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 maximum number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.