Radeon HD 5670 vs Radeon HD 7970

Intro

Compare those specs to the Radeon HD 7970, which comes with GPU clock speed of 925 MHz, and 3072 MB of GDDR5 memory running at 1375 MHz through a 384-bit bus. It also is comprised of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 7970		250 Watts
	Difference: 189 Watts (310%)

Memory Bandwidth

In theory, the Radeon HD 7970 should be 313% quicker than the Radeon HD 5670 in general, due to its higher bandwidth. (explain)

Radeon HD 7970		264000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 200000 (313%)

Texel Rate

The Radeon HD 7970 is quite a bit (approximately 664%) faster with regards to anisotropic filtering than the Radeon HD 5670. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 102900 (664%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7970 is the winner, by a large margin. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 23400 (377%)

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 information (counted in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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 reach the max fill rate.