Radeon HD 3470 512MB vs Radeon R7 240

Intro

Compare those specifications to the Radeon R7 240, which comes with a clock frequency of 730 MHz and a DDR3 memory speed of 900 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 320 SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3470 512MB should be a small bit faster than the Radeon R7 240 in general. (explain)

Radeon HD 3470 512MB		30400 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 1600 (6%)

Texel Rate

The Radeon R7 240 will be much (approximately 356%) faster with regards to AF than the Radeon HD 3470 512MB. (explain)

Radeon R7 240		14600 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 11400 (356%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R7 240 is the winner, and very much so. (explain)

Radeon R7 240		5840 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 2640 (83%)

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 max amount of data (measured in MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated 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 drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.