Radeon HD 6670 (OEM) 1GB vs Radeon RX 470 4GB

Intro

Compare that to the Radeon RX 470 4GB, which has GPU core speed of 926 MHz, and 4096 MB of GDDR5 RAM set to run at 1650 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 128 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) 1GB		63 Watts
Radeon RX 470 4GB		120 Watts
	Difference: 57 Watts (90%)

Memory Bandwidth

The Radeon RX 470 4GB should in theory be much faster than the Radeon HD 6670 (OEM) 1GB in general. (explain)

Radeon RX 470 4GB		211200 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 147200 (230%)

Texel Rate

The Radeon RX 470 4GB is a lot (about 517%) better at anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 99328 (517%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 470 4GB is the winner, by a large margin. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 23232 (363%)

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 largest amount of data (counted in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 can be applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.