Radeon R7 240 vs Radeon RX 470 4GB

Intro

Compare that 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 uses a 14 nm design. It is made up 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 240		30 Watts
Radeon RX 470 4GB		120 Watts
	Difference: 90 Watts (300%)

Memory Bandwidth

Performance-wise, the Radeon RX 470 4GB should theoretically be quite a bit superior to the Radeon R7 240 in general. (explain)

Radeon RX 470 4GB		211200 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 182400 (633%)

Texel Rate

The Radeon RX 470 4GB is a lot (more or less 712%) better at texture filtering than the Radeon R7 240. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 103928 (712%)

Pixel Rate

The Radeon RX 470 4GB is a lot (about 407%) more effective at AA than the Radeon R7 240, and should be capable of handling higher resolutions while still performing well. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 23792 (407%)

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 data (in units of MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.