Radeon HD 6670 (OEM) 1GB vs Radeon RX 550

Intro

Compare all of that to the Radeon RX 550, which comes with GPU core speed of 1100 MHz, and 2048 MB of GDDR5 RAM set to run at 1750 MHz through a 128-bit bus. It also is comprised of 512 SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550		50 Watts
Radeon HD 6670 (OEM) 1GB		63 Watts
	Difference: 13 Watts (26%)

Memory Bandwidth

As far as performance goes, the Radeon RX 550 should in theory be a lot superior to the Radeon HD 6670 (OEM) 1GB overall. (explain)

Radeon RX 550		114688 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 50688 (79%)

Texel Rate

The Radeon RX 550 will be a lot (about 83%) more effective at anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon RX 550		35200 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 16000 (83%)

Pixel Rate

The Radeon RX 550 is quite a bit (about 175%) more effective at anti-aliasing than the Radeon HD 6670 (OEM) 1GB, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon RX 550		17600 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 11200 (175%)

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 information (measured in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.