Radeon HD 3470 512MB vs Radeon HD 6670 (OEM) 1GB

Intro

Compare all that to the Radeon HD 6670 (OEM) 1GB, which comes with a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 128-bit bus. It also is comprised of 480 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 6670 (OEM) 1GB should perform much faster than the Radeon HD 3470 512MB overall. (explain)

Radeon HD 6670 (OEM) 1GB		64000 MB/sec
Radeon HD 3470 512MB		30400 MB/sec
	Difference: 33600 (111%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB will be quite a bit (approximately 500%) faster with regards to texture filtering than the Radeon HD 3470 512MB. (explain)

Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 16000 (500%)

Pixel Rate

The Radeon HD 6670 (OEM) 1GB will be quite a bit (approximately 100%) better at anti-aliasing than the Radeon HD 3470 512MB, and also should be capable of handling higher resolutions more effectively. (explain)

Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 3200 (100%)

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 (measured in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video 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 number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.