Radeon HD 3870 1GB vs Radeon HD 6670 (OEM) 1GB

Intro

Compare all of that to the Radeon HD 6670 (OEM) 1GB, which comes with core clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 480 SPUs along with 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
Radeon HD 3870 1GB		106 Watts
	Difference: 43 Watts (68%)

Memory Bandwidth

As far as performance goes, the Radeon HD 3870 1GB should in theory be a bit superior to the Radeon HD 6670 (OEM) 1GB overall. (explain)

Radeon HD 3870 1GB		72000 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB is quite a bit (more or less 55%) more effective at anisotropic filtering than the Radeon HD 3870 1GB. (explain)

Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
Radeon HD 3870 1GB		12400 Mtexels/sec
	Difference: 6800 (55%)

Pixel Rate

The Radeon HD 3870 1GB will be a lot (more or less 94%) faster with regards to AA than the Radeon HD 6670 (OEM) 1GB, and also capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 3870 1GB		12400 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 6000 (94%)

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 transported over the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics 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 number of pixels the video card can 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 Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 ability to get to the max fill rate.