GeForce 820M vs GeForce 920M

Intro

Compare all of that to the GeForce 920M, which uses a 28 nm design. nVidia has set the core frequency at 954 MHz. The DDR3 memory works at a speed of 900 MHz on this specific card. It features 384 SPUs as well as 32 Texture Address Units and 8 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 920M		1180 points
GeForce 820M		850 points
	Difference: 330 (39%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce 820M is 11% faster than the GeForce 920M overall, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce 920M should be quite a bit (more or less 165%) better at texture filtering than the GeForce 820M. (explain)

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

Pixel Rate

The GeForce 920M should be a lot (approximately 165%) better at anti-aliasing than the GeForce 820M, and able to handle higher screen resolutions while still performing well. (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

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across 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 RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units of the card 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of 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.