GeForce 920M vs GeForce GTX 870M

Intro

Compare all of that to the GeForce GTX 870M, which has a core clock speed of 941 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 192-bit bus, and uses a 28 nm design. It features 1344 SPUs, 112 Texture Address Units, and 24 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 870M		4770 points
GeForce 920M		1180 points
	Difference: 3590 (304%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 870M should perform quite a bit faster than the GeForce 920M overall. (explain)

GeForce GTX 870M		96000 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 81600 (567%)

Texel Rate

The GeForce GTX 870M should be quite a bit (approximately 245%) faster with regards to texture filtering than the GeForce 920M. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 74864 (245%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 870M is superior to the GeForce 920M, and very much so. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 14952 (196%)

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 largest amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of 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 clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.