Radeon HD 3470 256MB vs Radeon R7 240

Intro

Compare those specifications to the Radeon R7 240, which comes with a clock speed of 730 MHz and a DDR3 memory frequency of 900 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 320 SPUs, 20 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3470 256MB is 6% quicker than the Radeon R7 240 overall, because of its greater bandwidth. (explain)

Radeon HD 3470 256MB		30400 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 1600 (6%)

Texel Rate

The Radeon R7 240 should be a lot (more or less 356%) better at AF than the Radeon HD 3470 256MB. (explain)

Radeon R7 240		14600 Mtexels/sec
Radeon HD 3470 256MB		3200 Mtexels/sec
	Difference: 11400 (356%)

Pixel Rate

The Radeon R7 240 should be much (approximately 83%) better at FSAA than the Radeon HD 3470 256MB, and also capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R7 240		5840 Mpixels/sec
Radeon HD 3470 256MB		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: Bandwidth is the largest amount of data (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is worked out 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 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 number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. 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 many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.