Radeon R7 250X 2GB vs Radeon RX 580

Intro

Compare those specs to the Radeon RX 580, which uses a 14 nm design. AMD has set the core speed at 1257 MHz. The GDDR5 memory works at a frequency of 2000 MHz on this specific model. 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

As far as performance goes, the Radeon RX 580 should theoretically be quite a bit superior to the Radeon R7 250X 2GB overall. (explain)

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

Texel Rate

The Radeon RX 580 will be a lot (about 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

The Radeon RX 580 should be quite a bit (more or less 151%) better at AA than the Radeon R7 250X 2GB, and also able to handle higher resolutions while still performing well. (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 data (counted in MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.