Radeon HD 5670 vs Radeon HD 7950 3GB

Intro

Compare those specifications to the Radeon HD 7950 3GB, which has a GPU core clock speed of 800 MHz, and 3072 MB of GDDR5 memory set to run at 1250 MHz through a 384-bit bus. It also is comprised of 1792 Stream Processors, 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 3GB		200 Watts
	Difference: 139 Watts (228%)

Memory Bandwidth

Performance-wise, the Radeon HD 7950 3GB should in theory be quite a bit superior to the Radeon HD 5670 in general. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 176000 (275%)

Texel Rate

The Radeon HD 7950 3GB will be much (more or less 478%) better at AF than the Radeon HD 5670. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 74100 (478%)

Pixel Rate

The Radeon HD 7950 3GB should be much (approximately 313%) more effective at AA than the Radeon HD 5670, and will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 7950 3GB		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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics 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 most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.