Radeon HD 6670 (OEM) 1GB vs Radeon R9 380 4G

Intro

Compare that to the Radeon R9 380 4G, which makes use of a 28 nm design. AMD has set the core frequency at 970 MHz. The GDDR5 RAM is set to run at a speed of 1425 MHz on this specific card. It features 1792 SPUs along with 112 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
Radeon R9 380 4G		190 Watts
	Difference: 127 Watts (202%)

Memory Bandwidth

In theory, the Radeon R9 380 4G should be 185% faster than the Radeon HD 6670 (OEM) 1GB in general, due to its greater bandwidth. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 118400 (185%)

Texel Rate

The Radeon R9 380 4G should be much (approximately 466%) more effective at texture filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 89440 (466%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 380 4G is the winner, by far. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 24640 (385%)

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 megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. 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 output rate also depends on lots of 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.