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

Intro

Compare those specs to the Radeon HD 6670 (OEM) 1GB, which features a core clock speed of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It is comprised of 480 SPUs, 24 Texture Address Units, and 8 Raster Operation 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 3850 1GB		75 Watts
	Difference: 12 Watts (19%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6670 (OEM) 1GB should be 21% quicker than the Radeon HD 3850 1GB overall, due to its higher bandwidth. (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 will be a lot (approximately 80%) faster with regards to AF 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

If using a high resolution is important to you, then the Radeon HD 3850 1GB is superior to the Radeon HD 6670 (OEM) 1GB, by far. (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 maximum amount of information (measured in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out 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 drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.