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GeForce GTX 1080 vs GeForce GTX 950

Intro

The GeForce GTX 1080 comes with a GPU core clock speed of 1607 MHz, and the 8192 MB of GDDR5X RAM runs at 1251 MHz through a 256-bit bus. It also is comprised of 2560 Stream Processors, 160 TAUs, and 64 Raster Operation Units.

Compare those specs to the GeForce GTX 950, which has a GPU core clock speed of 1024 MHz, and 2048 MB of GDDR5 memory running at 1652 MHz through a 128-bit bus. It also features 768 Stream Processors, 48 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950 90 Watts
GeForce GTX 1080 180 Watts
Difference: 90 Watts (100%)

Memory Bandwidth

In theory, the GeForce GTX 1080 will be 210% faster than the GeForce GTX 950 overall, because of its greater bandwidth. (explain)

GeForce GTX 1080 327680 MB/sec
GeForce GTX 950 105728 MB/sec
Difference: 221952 (210%)

Texel Rate

The GeForce GTX 1080 should be a lot (more or less 423%) more effective at AF than the GeForce GTX 950. (explain)

GeForce GTX 1080 257120 Mtexels/sec
GeForce GTX 950 49152 Mtexels/sec
Difference: 207968 (423%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 1080 is a better choice, by a large margin. (explain)

GeForce GTX 1080 102848 Mpixels/sec
GeForce GTX 950 32768 Mpixels/sec
Difference: 70080 (214%)

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 GTX 1080

Amazon.com

GeForce GTX 950

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

Display Specifications

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Model GeForce GTX 1080 GeForce GTX 950
Manufacturer nVidia nVidia
Year May 2016 August 2015
Code Name GP104-400 GM206
Memory 8192 MB 2048 MB
Core Speed 1607 MHz 1024 MHz
Memory Speed 10008 MHz 6608 MHz
Power (Max TDP) 180 watts 90 watts
Bandwidth 327680 MB/sec 105728 MB/sec
Texel Rate 257120 Mtexels/sec 49152 Mtexels/sec
Pixel Rate 102848 Mpixels/sec 32768 Mpixels/sec
Unified Shaders 2560 768
Texture Mapping Units 160 48
Render Output Units 64 32
Bus Type GDDR5X GDDR5
Bus Width 256-bit 128-bit
Fab Process 16 nm 28 nm
Transistors 7200 million 2940 million
Bus PCIe 3.0 ×16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Comments

One Response to “GeForce GTX 1080 vs GeForce GTX 950”
kyaw moe khine says:

Dear sir,
Could you please advise me that GeForce GTX 1080 graphic card is more appropriate or not for Pix4D software.

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