Radeon R7 250X 2GB vs Radeon RX 570

Intro

Compare all of that to the Radeon RX 570, which features a GPU core clock speed of 1168 MHz, and 4096 MB of GDDR5 RAM running at 1750 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
Radeon RX 570		150 Watts
	Difference: 55 Watts (58%)

Memory Bandwidth

Performance-wise, the Radeon RX 570 should theoretically be quite a bit better than the Radeon R7 250X 2GB in general. (explain)

Radeon RX 570		229376 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 157376 (219%)

Texel Rate

The Radeon RX 570 is a lot (about 274%) more effective at texture filtering than the Radeon R7 250X 2GB. (explain)

Radeon RX 570		149504 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 109504 (274%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 570 is a better choice, by a large margin. (explain)

Radeon RX 570		37376 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 21376 (134%)

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 data (counted in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.