Radeon R7 250X 2GB vs Radeon RX 580

Intro

Compare all of that to the Radeon RX 580, which has clock speeds of 1257 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2304 SPUs along with 144 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
Radeon RX 580		185 Watts
	Difference: 90 Watts (95%)

Memory Bandwidth

The Radeon RX 580, in theory, should perform quite a bit faster than the Radeon R7 250X 2GB in general. (explain)

Radeon RX 580		262144 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 190144 (264%)

Texel Rate

The Radeon RX 580 is a lot (approximately 353%) better at AF than the Radeon R7 250X 2GB. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 141008 (353%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 580 is superior to the Radeon R7 250X 2GB, by a large margin. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 24224 (151%)

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 largest amount of information (measured in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card 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 clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.