GeForce 820M vs GeForce GTX 780 Ti

Intro

Compare all that to the GeForce GTX 780 Ti, which features GPU clock speed of 875 MHz, and 3072 MB of GDDR5 memory running at 1750 MHz through a 384-bit bus. It also features 2880 SPUs, 240 TAUs, and 48 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 780 Ti		10900 points
GeForce 820M		850 points
	Difference: 10050 (1182%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 235 Watts (1567%)

Memory Bandwidth

Performance-wise, the GeForce GTX 780 Ti should in theory be a lot better than the GeForce 820M in general. (explain)

GeForce GTX 780 Ti		336000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 320000 (2000%)

Texel Rate

The GeForce GTX 780 Ti will be quite a bit (about 1725%) more effective at texture filtering than the GeForce 820M. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 198496 (1725%)

Pixel Rate

The GeForce GTX 780 Ti should be much (more or less 1360%) better at full screen anti-aliasing than the GeForce 820M, and also will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 39124 (1360%)

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 maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units of the card 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. 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 also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.