GeForce GTX 1080 vs Radeon R7 250X 2GB

Intro

Compare those specs to the Radeon R7 250X 2GB, which uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a frequency of 1125 MHz on this particular card. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
GeForce GTX 1080		180 Watts
	Difference: 85 Watts (89%)

Memory Bandwidth

Performance-wise, the GeForce GTX 1080 should in theory be much superior to the Radeon R7 250X 2GB in general. (explain)

GeForce GTX 1080		327680 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 255680 (355%)

Texel Rate

The GeForce GTX 1080 is quite a bit (more or less 543%) faster with regards to anisotropic filtering than the Radeon R7 250X 2GB. (explain)

GeForce GTX 1080		257120 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 217120 (543%)

Pixel Rate

The GeForce GTX 1080 should be a lot (more or less 543%) better at full screen anti-aliasing than the Radeon R7 250X 2GB, and should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 1080		102848 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 86848 (543%)

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 maximum amount of information (measured in MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.