Radeon HD 5670 vs Radeon R9 270

Intro

Compare those specifications to the Radeon R9 270, which has GPU clock speed of 900 MHz, and 2048 MB of GDDR5 RAM set to run at 1400 MHz through a 256-bit bus. It also features 1280 SPUs, 80 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon R9 270		150 Watts
	Difference: 89 Watts (146%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 will be 180% faster than the Radeon HD 5670 in general, because of its greater bandwidth. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 115200 (180%)

Texel Rate

The Radeon R9 270 should be much (about 365%) faster with regards to AF than the Radeon HD 5670. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 56500 (365%)

Pixel Rate

The Radeon R9 270 will be quite a bit (approximately 365%) better at full screen anti-aliasing than the Radeon HD 5670, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 22600 (365%)

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 (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core 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 maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.