Radeon HD 5570 vs Radeon HD 6670 (OEM) 1GB

Intro

Compare that to the Radeon HD 6670 (OEM) 1GB, which has a clock speed of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It features 480 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570		43 Watts
Radeon HD 6670 (OEM) 1GB		63 Watts
	Difference: 20 Watts (47%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6670 (OEM) 1GB should theoretically be a lot better than the Radeon HD 5570 in general. (explain)

Radeon HD 6670 (OEM) 1GB		64000 MB/sec
Radeon HD 5570		28800 MB/sec
	Difference: 35200 (122%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB should be quite a bit (more or less 48%) faster with regards to texture filtering than the Radeon HD 5570. (explain)

Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 6200 (48%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6670 (OEM) 1GB is a better choice, by a large margin. (explain)

Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 1200 (23%)

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 moved past the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses 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 high resolutions.

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

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