GeForce 820M vs Nvidia Titan X

Intro

Compare those specifications to the Nvidia Titan X, which makes use of a 16 nm design. nVidia has clocked the core speed at 1417 MHz. The GDDR5X memory is set to run at a frequency of 1251 MHz on this card. It features 3584 SPUs along with 224 Texture Address Units and 96 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Nvidia Titan X		250 Watts
	Difference: 235 Watts (1567%)

Memory Bandwidth

The Nvidia Titan X should in theory perform quite a bit faster than the GeForce 820M in general. (explain)

Nvidia Titan X		491520 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 475520 (2972%)

Texel Rate

The Nvidia Titan X is much (more or less 2659%) better at AF than the GeForce 820M. (explain)

Nvidia Titan X		317408 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 305904 (2659%)

Pixel Rate

The Nvidia Titan X is much (more or less 4630%) better at FSAA than the GeForce 820M, and will be capable of handling higher screen resolutions while still performing well. (explain)

Nvidia Titan X		136032 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 133156 (4630%)

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 (measured in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.