Radeon R7 250 vs Radeon RX 480 4GB

Intro

Compare those specs to the Radeon RX 480 4GB, which features GPU clock speed of 1120 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 256-bit bus. It also features 2304 SPUs, 144 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon RX 480 4GB		150 Watts
	Difference: 85 Watts (131%)

Memory Bandwidth

As far as performance goes, the Radeon RX 480 4GB should in theory be quite a bit better than the Radeon R7 250 overall. (explain)

Radeon RX 480 4GB		229376 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 155776 (212%)

Texel Rate

The Radeon RX 480 4GB will be much (about 572%) more effective at AF than the Radeon R7 250. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 137280 (572%)

Pixel Rate

The Radeon RX 480 4GB will be much (more or less 348%) better at AA than the Radeon R7 250, and capable of handling higher resolutions while still performing well. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 27840 (348%)

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 max amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, 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 number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.