Radeon HD 3850 1GB vs Radeon HD 6670 (OEM)

Intro

Compare all that to the Radeon HD 6670 (OEM), which comes with a core clock speed of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It is made up of 480 SPUs, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
Radeon HD 3850 1GB		75 Watts
	Difference: 12 Watts (19%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6670 (OEM) should perform quite a bit faster than the Radeon HD 3850 1GB overall. (explain)

Radeon HD 6670 (OEM)		64000 MB/sec
Radeon HD 3850 1GB		52992 MB/sec
	Difference: 11008 (21%)

Texel Rate

The Radeon HD 6670 (OEM) is quite a bit (approximately 80%) better at AF than the Radeon HD 3850 1GB. (explain)

Radeon HD 6670 (OEM)		19200 Mtexels/sec
Radeon HD 3850 1GB		10688 Mtexels/sec
	Difference: 8512 (80%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 3850 1GB is superior to the Radeon HD 6670 (OEM), and very much so. (explain)

Radeon HD 3850 1GB		10688 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 4288 (67%)

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 information (measured in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). 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 potential to reach the maximum fill rate.