GeForce 820M vs GeForce 920M

Intro

Compare those specs to the GeForce 920M, which uses a 28 nm design. nVidia has clocked the core speed at 954 MHz. The DDR3 memory runs at a frequency of 900 MHz on this particular model. It features 384 SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

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, the GeForce 820M should perform just a bit faster than the GeForce 920M overall. (explain)

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

Texel Rate

The GeForce 920M should be quite a bit (approximately 165%) more effective at anisotropic 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 (more or less 165%) more effective at FSAA than the GeForce 820M, and able to handle higher screen resolutions without losing too much performance. (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 max amount of data (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it should 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, High Dynamic Range 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 number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling 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 that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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 fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.