Radeon R7 250 vs Radeon RX 470 4GB

Intro

Compare those specs to the Radeon RX 470 4GB, which has a core clock speed of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also makes use of a 256-bit memory bus, and makes use of 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

The Radeon RX 470 4GB should in theory perform a lot 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 (more or less 394%) better 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

The Radeon RX 470 4GB should be a lot (about 270%) faster with regards to anti-aliasing than the Radeon R7 250, and also should be capable of handling higher screen resolutions without slowing down too much. (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 largest amount of information (in units of MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.