Radeon HD 5670 vs Radeon HD 7950

Intro

Compare those specifications to the Radeon HD 7950, which comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 384-bit bus, and makes use of a 28 nm design. It is comprised of 1792 SPUs, 112 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 7950		200 Watts
	Difference: 139 Watts (228%)

Memory Bandwidth

In theory, the Radeon HD 7950 should be 275% faster than the Radeon HD 5670 overall, due to its higher bandwidth. (explain)

Radeon HD 7950		240000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 176000 (275%)

Texel Rate

The Radeon HD 7950 is quite a bit (approximately 478%) faster with regards to anisotropic filtering than the Radeon HD 5670. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 74100 (478%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7950 is the winner, by a large margin. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 19400 (313%)

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 megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.