GeForce 920M vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which has core clock speeds of 941 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 RAM. It features 1344 SPUs as well as 112 TAUs and 24 Rasterization Operator Units.

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 speaking, the GeForce GTX 870M is 567% quicker than the GeForce 920M overall, because of its greater bandwidth. (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 (about 245%) faster with regards to AF than the GeForce 920M. (explain)

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

Pixel Rate

The GeForce GTX 870M will be quite a bit (approximately 196%) faster with regards to anti-aliasing than the GeForce 920M, and will be able to handle higher resolutions more effectively. (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: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the 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 the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.