GeForce 820M vs GeForce GTX 980 Ti

Intro

Compare those specifications to the GeForce GTX 980 Ti, which features core clock speeds of 1000 MHz on the GPU, and 1750 MHz on the 6144 MB of GDDR5 RAM. It features 2816 SPUs along with 176 Texture Address Units and 96 Rasterization Operator Units.

Display Graphs

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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 980 Ti		17120 points
GeForce 820M		850 points
	Difference: 16270 (1914%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTX 980 Ti		250 Watts
	Difference: 235 Watts (1567%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980 Ti will be 2000% quicker than the GeForce 820M in general, due to its higher data rate. (explain)

GeForce GTX 980 Ti		336000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 320000 (2000%)

Texel Rate

The GeForce GTX 980 Ti will be a lot (more or less 1430%) more effective at anisotropic filtering than the GeForce 820M. (explain)

GeForce GTX 980 Ti		176000 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 164496 (1430%)

Pixel Rate

The GeForce GTX 980 Ti will be much (more or less 3238%) better at full screen anti-aliasing than the GeForce 820M, and also able to handle higher screen resolutions better. (explain)

GeForce GTX 980 Ti		96000 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 93124 (3238%)

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 information (in units of MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 are processed in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out 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 outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.