GeForce GTX 980 Ti vs Radeon R7 250X 2GB

Intro

Compare those specs to the Radeon R7 250X 2GB, which features core clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
GeForce GTX 980 Ti		250 Watts
	Difference: 155 Watts (163%)

Memory Bandwidth

In theory, the GeForce GTX 980 Ti should be 367% quicker than the Radeon R7 250X 2GB overall, because of its greater bandwidth. (explain)

GeForce GTX 980 Ti		336000 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 264000 (367%)

Texel Rate

The GeForce GTX 980 Ti should be a lot (approximately 340%) more effective at anisotropic filtering than the Radeon R7 250X 2GB. (explain)

GeForce GTX 980 Ti		176000 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 136000 (340%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 980 Ti is superior to the Radeon R7 250X 2GB, and very much so. (explain)

GeForce GTX 980 Ti		96000 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 80000 (500%)

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 MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core 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 processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.