Radeon R7 250X 2GB vs Radeon RX 460 2GB

Intro

Compare those specifications to the Radeon RX 460 2GB, which features a GPU core clock speed of 1090 MHz, and 2048 MB of GDDR5 memory running at 1750 MHz through a 128-bit bus. It also features 896 Stream Processors, 56 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 2GB		75 Watts
Radeon R7 250X 2GB		95 Watts
	Difference: 20 Watts (27%)

Memory Bandwidth

The Radeon RX 460 2GB, in theory, should be quite a bit faster than the Radeon R7 250X 2GB in general. (explain)

Radeon RX 460 2GB		112000 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 40000 (56%)

Texel Rate

The Radeon RX 460 2GB is much (more or less 53%) better at anisotropic filtering than the Radeon R7 250X 2GB. (explain)

Radeon RX 460 2GB		61040 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 21040 (53%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 460 2GB is the winner, not by a very large margin though. (explain)

Radeon RX 460 2GB		17440 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 1440 (9%)

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 (in units of MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.