Radeon R7 250 vs Radeon RX 470 4GB

Intro

Compare those specifications to the Radeon RX 470 4GB, which features a core clock speed of 926 MHz and a GDDR5 memory speed of 1650 MHz. It also makes use of a 256-bit memory bus, and uses a 14 nm design. It is comprised of 2048 SPUs, 128 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 470 4GB		120 Watts
	Difference: 55 Watts (85%)

Memory Bandwidth

Theoretically, the Radeon RX 470 4GB should perform much faster than the Radeon R7 250 overall. (explain)

Radeon RX 470 4GB		211200 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 137600 (187%)

Texel Rate

The Radeon RX 470 4GB is quite a bit (about 394%) more effective at texture filtering than the Radeon R7 250. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 94528 (394%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 470 4GB is superior to the Radeon R7 250, and very much so. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 21632 (270%)

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 information (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units 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 fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.