GeForce GTX 460 2GB vs Radeon R7 250X

Intro

Compare all of that to the Radeon R7 250X, which has clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X		95 Watts
GeForce GTX 460 2GB		160 Watts
	Difference: 65 Watts (68%)

Memory Bandwidth

Performance-wise, the GeForce GTX 460 2GB should theoretically be quite a bit better than the Radeon R7 250X overall. (explain)

GeForce GTX 460 2GB		115200 MB/sec
Radeon R7 250X		72000 MB/sec
	Difference: 43200 (60%)

Texel Rate

The Radeon R7 250X is a small bit (more or less 6%) better at texture filtering than the GeForce GTX 460 2GB. (explain)

Radeon R7 250X		40000 Mtexels/sec
GeForce GTX 460 2GB		37800 Mtexels/sec
	Difference: 2200 (6%)

Pixel Rate

The GeForce GTX 460 2GB is a lot (about 35%) faster with regards to anti-aliasing than the Radeon R7 250X, and also should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
Radeon R7 250X		16000 Mpixels/sec
	Difference: 5600 (35%)

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 max amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video 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 maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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 memory bandwidth is, the lower the ability to reach the maximum fill rate.