Radeon HD 5670 vs Radeon HD 5750 512MB

Intro

Compare those specifications to the Radeon HD 5750 512MB, which features a clock frequency of 700 MHz and a GDDR5 memory frequency of 1150 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It features 720(144x5) SPUs, 36 TAUs, and 16 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 5750 512MB		86 Watts
	Difference: 25 Watts (41%)

Memory Bandwidth

Performance-wise, the Radeon HD 5750 512MB should theoretically be a bit superior to the Radeon HD 5670 overall. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 9600 (15%)

Texel Rate

The Radeon HD 5750 512MB will be much (more or less 63%) better at texture filtering than the Radeon HD 5670. (explain)

Radeon HD 5750 512MB		25200 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 9700 (63%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 5750 512MB is superior to the Radeon HD 5670, by far. (explain)

Radeon HD 5750 512MB		11200 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 5000 (81%)

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 max amount of data (measured in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. 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 ability to reach the max fill rate.