Radeon HD 5670 vs Radeon R7 250

Intro

Compare all that to the Radeon R7 250, which features GPU core speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1150 MHz through a 128-bit bus. It also features 384 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon R7 250		65 Watts
	Difference: 4 Watts (7%)

Memory Bandwidth

As far as performance goes, the Radeon R7 250 should in theory be a bit better than the Radeon HD 5670 in general. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 9600 (15%)

Texel Rate

The Radeon R7 250 should be a lot (approximately 55%) better at anisotropic filtering than the Radeon HD 5670. (explain)

Radeon R7 250		24000 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 8500 (55%)

Pixel Rate

The Radeon R7 250 is quite a bit (about 29%) better at FSAA than the Radeon HD 5670, and will be able to handle higher resolutions without slowing down too much. (explain)

Radeon R7 250		8000 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 1800 (29%)

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 max amount of data (measured in megabytes per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If 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 higher screen resolutions.

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

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