Radeon HD 3470 512MB vs Radeon R7 250

Intro

Compare those specifications to the Radeon R7 250, which makes use of a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM runs at a frequency of 1150 MHz on this specific model. It features 384 SPUs along with 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R7 250 should be a lot faster than the Radeon HD 3470 512MB overall. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 3470 512MB		30400 MB/sec
	Difference: 43200 (142%)

Texel Rate

The Radeon R7 250 should be much (more or less 650%) more effective at AF than the Radeon HD 3470 512MB. (explain)

Radeon R7 250		24000 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 20800 (650%)

Pixel Rate

The Radeon R7 250 will be much (about 150%) better at FSAA than the Radeon HD 3470 512MB, and will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R7 250		8000 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 4800 (150%)

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 maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.