GeForce 820M vs GeForce GTX 560

Intro

Compare all of that to the GeForce GTX 560, which features a core clock speed of 810 MHz and a GDDR5 memory speed of 1001 MHz. It also uses a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 336 SPUs, 56 TAUs, and 32 Raster Operation 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 GTX 560		3030 points
GeForce 820M		850 points
	Difference: 2180 (256%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTX 560		150 Watts
	Difference: 135 Watts (900%)

Memory Bandwidth

Performance-wise, the GeForce GTX 560 should theoretically be a lot better than the GeForce 820M overall. (explain)

GeForce GTX 560		128128 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 112128 (701%)

Texel Rate

The GeForce GTX 560 is a lot (approximately 294%) better at AF than the GeForce 820M. (explain)

GeForce GTX 560		45360 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 33856 (294%)

Pixel Rate

The GeForce GTX 560 will be quite a bit (about 801%) more effective at AA than the GeForce 820M, and should be able to handle higher screen resolutions better. (explain)

GeForce GTX 560		25920 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 23044 (801%)

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: Bandwidth is the max amount of data (in units of MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the 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 the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.