Radeon HD 6670 (OEM) vs Radeon RX 480 4GB

Intro

Compare those specifications to the Radeon RX 480 4GB, which comes with GPU clock speed of 1120 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 256-bit bus. It also features 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
Radeon RX 480 4GB		150 Watts
	Difference: 87 Watts (138%)

Memory Bandwidth

As far as performance goes, the Radeon RX 480 4GB should in theory be much better than the Radeon HD 6670 (OEM) in general. (explain)

Radeon RX 480 4GB		229376 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 165376 (258%)

Texel Rate

The Radeon RX 480 4GB should be quite a bit (more or less 740%) faster with regards to AF than the Radeon HD 6670 (OEM). (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 142080 (740%)

Pixel Rate

The Radeon RX 480 4GB will be quite a bit (more or less 460%) better at anti-aliasing than the Radeon HD 6670 (OEM), and will be capable of handling higher resolutions more effectively. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 29440 (460%)

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 max amount of data (in units of megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, 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 is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 get to the max fill rate.