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GeForce 810M vs GeForce 920M

Intro

The GeForce 810M features a GPU clock speed of 738 MHz, and the 1024 MB of DDR3 RAM is set to run at 900 MHz through a 64-bit bus. It also features 48 Stream Processors, 8 TAUs, and 4 Raster Operation Units.

Compare those specs to the GeForce 920M, which comes with core clock speeds of 954 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 384 SPUs along with 32 TAUs and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have the exact same bandwidth, so theoretically they should perform exactly the same. (explain)

Texel Rate

The GeForce 920M should be quite a bit (more or less 417%) better at texture filtering than the GeForce 810M. (explain)

GeForce 920M		30528 Mtexels/sec
GeForce 810M		5904 Mtexels/sec
	Difference: 24624 (417%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce 920M is superior to the GeForce 810M, by a large margin. (explain)

GeForce 920M		7632 Mpixels/sec
GeForce 810M		2952 Mpixels/sec
	Difference: 4680 (159%)

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

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GeForce 810M

Amazon.com

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GeForce 920M

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model	GeForce 810M	GeForce 920M
Manufacturer	nVidia	nVidia
Year	February 2014	March 12 2015
Code Name	GF117	GK208
Memory	1024 MB	2048 MB
Core Speed	738 MHz	954 MHz
Memory Speed	1800 MHz	1800 MHz
Power (Max TDP)	15 watts	(Unknown) watts
Bandwidth	14400 MB/sec	14400 MB/sec
Texel Rate	5904 Mtexels/sec	30528 Mtexels/sec
Pixel Rate	2952 Mpixels/sec	7632 Mpixels/sec
Unified Shaders	48	384
Texture Mapping Units	8	32
Render Output Units	4	8
Bus Type	DDR3	DDR3
Bus Width	64-bit	64-bit
Fab Process	28 nm	28 nm
Transistors	(Unknown) million	(Unknown) million
Bus	PCIe 2.0 x16	PCIe 3.0 x16
DirectX Version	DirectX 12	DirectX 12
OpenGL Version	OpenGL 4.5	OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of 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.

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