Radeon HD 6670 (OEM) vs Radeon HD 6950 2GB

Intro

Compare those specifications to the Radeon HD 6950 2GB, which uses a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this specific card. It features 1408 SPUs along with 88 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 137 Watts (217%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6950 2GB should theoretically be a lot better than the Radeon HD 6670 (OEM) overall. (explain)

Radeon HD 6950 2GB		160000 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 96000 (150%)

Texel Rate

The Radeon HD 6950 2GB will be much (approximately 267%) faster with regards to anisotropic filtering than the Radeon HD 6670 (OEM). (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 51200 (267%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6950 2GB is superior to the Radeon HD 6670 (OEM), by far. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 19200 (300%)

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 largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the 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 maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.