Radeon R7 250 vs Radeon RX 480 4GB

Intro

Compare those specs to the Radeon RX 480 4GB, which uses a 14 nm design. AMD has clocked the core frequency at 1120 MHz. The GDDR5 RAM works at a speed of 1750 MHz on this model. It features 2304 SPUs along with 144 Texture Address Units and 32 Rasterization Operator Units.

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

Performance-wise, the Radeon RX 480 4GB should theoretically be much 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 should be a lot (more or less 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

If using lots of anti-aliasing is important to you, then the Radeon RX 480 4GB is the winner, by far. (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 largest amount of data (counted in MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.