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

Intro

Compare all that to the Radeon HD 6670 (OEM) 1GB, which features a clock speed of 800 MHz and a GDDR5 memory frequency 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 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the Radeon HD 6670 (OEM) 1GB should theoretically be much better than the Radeon HD 3850 1GB in general. (explain)

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

Texel Rate

The Radeon HD 6670 (OEM) 1GB should be a lot (about 80%) more effective at texture filtering than the Radeon HD 3850 1GB. (explain)

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

Pixel Rate

The Radeon HD 3850 1GB should be a lot (more or less 67%) better at AA than the Radeon HD 6670 (OEM) 1GB, and will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 3850 1GB		10688 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.