Radeon R7 250X 2GB vs Radeon RX 460

Intro

Compare those specs to the Radeon RX 460, which features core clock speeds of 1090 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Radeon RX 460 should be 56% faster than the Radeon R7 250X 2GB overall, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon RX 460 will be a lot (about 53%) more effective at anisotropic filtering than the Radeon R7 250X 2GB. (explain)

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

Pixel Rate

The Radeon RX 460 is a small bit (more or less 9%) better at AA than the Radeon R7 250X 2GB, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 460		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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out 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 video card will be at handling 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 could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.