Compare any two graphics cards:
GeForce 920M vs GeForce GTX 1080
IntroThe GeForce 920M features a GPU clock speed of 954 MHz, and the 2048 MB of DDR3 memory runs at 900 MHz through a 64-bit bus. It also is made up of 384 Stream Processors, 32 Texture Address Units, and 8 ROPs.
Compare those specifications to the GeForce GTX 1080, which uses a 16 nm design. nVidia has clocked the core frequency at 1607 MHz. The GDDR5X RAM works at a frequency of 1251 MHz on this particular model. It features 2560 SPUs along with 160 TAUs and 64 ROPs.
Power Usage and Theoretical Benchmarks
The GeForce GTX 1080, in theory, should perform much faster than the GeForce 920M overall. (explain)
Texel RateThe GeForce GTX 1080 will be much (approximately 742%) faster with regards to AF than the GeForce 920M. (explain)
Pixel RateThe GeForce GTX 1080 will be quite a bit (about 1248%) more effective at full screen anti-aliasing than the GeForce 920M, and also able to handle higher resolutions without losing too much performance. (explain)
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.
GeForce GTX 1080
Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the 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 one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.
GeForce GTX 1080