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GeForce 920M vs GeForce GTX 1080

Intro

The GeForce 920M comes with a core clock speed of 954 MHz and a DDR3 memory frequency of 900 MHz. It also makes use of a 64-bit memory bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Compare those specifications to the GeForce GTX 1080, which has GPU core speed of 1607 MHz, and 8192 MB of GDDR5X RAM set to run at 1251 MHz through a 256-bit bus. It also is comprised of 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GTX 1080 should theoretically be quite a bit better than the GeForce 920M overall. (explain)

GeForce GTX 1080 327680 MB/sec
GeForce 920M 14400 MB/sec
Difference: 313280 (2176%)

Texel Rate

The GeForce GTX 1080 will be much (about 742%) faster with regards to anisotropic filtering than the GeForce 920M. (explain)

GeForce GTX 1080 257120 Mtexels/sec
GeForce 920M 30528 Mtexels/sec
Difference: 226592 (742%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 1080 is a better choice, by far. (explain)

GeForce GTX 1080 102848 Mpixels/sec
GeForce 920M 7632 Mpixels/sec
Difference: 95216 (1248%)

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

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GeForce 920M

Amazon.com

GeForce GTX 1080

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 920M GeForce GTX 1080
Manufacturer nVidia nVidia
Year March 12 2015 May 2016
Code Name GK208 GP104-400
Memory 2048 MB 8192 MB
Core Speed 954 MHz 1607 MHz
Memory Speed 1800 MHz 10008 MHz
Power (Max TDP) (Unknown) watts 180 watts
Bandwidth 14400 MB/sec 327680 MB/sec
Texel Rate 30528 Mtexels/sec 257120 Mtexels/sec
Pixel Rate 7632 Mpixels/sec 102848 Mpixels/sec
Unified Shaders 384 2560
Texture Mapping Units 32 160
Render Output Units 8 64
Bus Type DDR3 GDDR5X
Bus Width 64-bit 256-bit
Fab Process 28 nm 16 nm
Transistors (Unknown) million 7200 million
Bus PCIe 3.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 12 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that are applied in one second. This is worked out by multiplying the total 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

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