GeForce 820M vs GeForce GTX 980 Ti

Intro

Compare those specs to the GeForce GTX 980 Ti, which has a GPU core clock speed of 1000 MHz, and 6144 MB of GDDR5 RAM running at 1750 MHz through a 384-bit bus. It also features 2816 SPUs, 176 Texture Address Units, and 96 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 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, the GeForce GTX 980 Ti should perform much faster than the GeForce 820M overall. (explain)

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

Texel Rate

The GeForce GTX 980 Ti should be much (about 1430%) better at AF 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 quite a bit (about 3238%) faster with regards to FSAA than the GeForce 820M, and also will be capable of handling higher resolutions more effectively. (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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.