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GeForce 820M vs GeForce 920M

Intro

The GeForce 820M comes with a clock speed of 719 MHz and a DDR3 memory frequency of 1000 MHz. It also uses a 64-bit bus, and uses a 28 nm design. It is made up of 96 SPUs, 16 TAUs, and 4 ROPs.

Compare all of that to the GeForce 920M, which makes use of a 28 nm design. nVidia has set the core frequency at 954 MHz. The DDR3 memory runs at a speed of 900 MHz on this card. It features 384 SPUs along with 32 TAUs and 8 ROPs.

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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 920M		1180 points
GeForce 820M		850 points
	Difference: 330 (39%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 820M should in theory perform a bit faster than the GeForce 920M in general. (explain)

GeForce 820M		16000 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The GeForce 920M is much (approximately 165%) better at anisotropic filtering than the GeForce 820M. (explain)

GeForce 920M		30528 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 19024 (165%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 920M is the winner, by a large margin. (explain)

GeForce 920M		7632 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 4756 (165%)

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 820M

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 820M	GeForce 920M
Manufacturer	nVidia	nVidia
Year	February 2014	March 12 2015
Code Name	GF117	GK208
Memory	2048 MB	2048 MB
Core Speed	719 MHz	954 MHz
Memory Speed	2000 MHz	1800 MHz
Power (Max TDP)	15 watts	(Unknown) watts
Bandwidth	16000 MB/sec	14400 MB/sec
Texel Rate	11504 Mtexels/sec	30528 Mtexels/sec
Pixel Rate	2876 Mpixels/sec	7632 Mpixels/sec
Unified Shaders	96	384
Texture Mapping Units	16	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 max amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 maximum fill rate.

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