GeForce 810M vs GeForce 820M

Intro

Compare that to the GeForce 820M, which comes with a clock frequency of 719 MHz and a DDR3 memory frequency of 1000 MHz. It also features a 64-bit bus, and uses a 28 nm design. It is comprised of 96 SPUs, 16 TAUs, and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the GeForce 820M should be 11% faster than the GeForce 810M overall, because of its greater data rate. (explain)

GeForce 820M		16000 MB/sec
GeForce 810M		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The GeForce 820M will be much (more or less 95%) better at AF than the GeForce 810M. (explain)

GeForce 820M		11504 Mtexels/sec
GeForce 810M		5904 Mtexels/sec
	Difference: 5600 (95%)

Pixel Rate

The GeForce 810M should be just a bit (about 3%) more effective at anti-aliasing than the GeForce 820M, and capable of handling higher screen resolutions while still performing well. (explain)

GeForce 810M		2952 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 76 (3%)

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 largest amount of information (counted in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling 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 the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.