Radeon R7 250 vs Radeon RX 480 4GB

Intro

Compare those specifications to the Radeon RX 480 4GB, which has core speeds of 1120 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. It features 2304 SPUs along with 144 TAUs 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

In theory, the Radeon RX 480 4GB should be 212% faster than the Radeon R7 250 overall, due to its higher data rate. (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 a lot (approximately 572%) faster with regards to 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 running with a high resolution is important to you, then the Radeon RX 480 4GB is the winner, by a large margin. (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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 are processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.