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GeForce 810M vs GeForce 920M

Intro

The GeForce 810M comes with a clock speed of 738 MHz and a DDR3 memory speed of 900 MHz. It also uses a 64-bit bus, and makes use of a 28 nm design. It is comprised of 48 SPUs, 8 TAUs, and 4 ROPs.

Compare all that to the GeForce 920M, which features a core clock frequency of 954 MHz and a DDR3 memory frequency of 900 MHz. It also uses a 64-bit memory bus, and makes use of a 28 nm design. It features 384 SPUs, 32 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

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

Texel Rate

The GeForce 920M is quite a bit (about 417%) more effective at AF than the GeForce 810M. (explain)

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

Pixel Rate

The GeForce 920M is a lot (about 159%) more effective at FSAA than the GeForce 810M, and also will be able to handle higher resolutions while still performing well. (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 data (measured in MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

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