Radeon HD 3470 256MB vs Radeon R7 250

Intro

Compare that to the Radeon R7 250, which comes with a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM set to run at 1150 MHz through a 128-bit bus. It also features 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R7 250 should theoretically be quite a bit better than the Radeon HD 3470 256MB in general. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 3470 256MB		30400 MB/sec
	Difference: 43200 (142%)

Texel Rate

The Radeon R7 250 will be a lot (about 650%) better at texture filtering than the Radeon HD 3470 256MB. (explain)

Radeon R7 250		24000 Mtexels/sec
Radeon HD 3470 256MB		3200 Mtexels/sec
	Difference: 20800 (650%)

Pixel Rate

The Radeon R7 250 should be quite a bit (about 150%) faster with regards to full screen anti-aliasing than the Radeon HD 3470 256MB, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R7 250		8000 Mpixels/sec
Radeon HD 3470 256MB		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 largest amount of information (counted in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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