Radeon HD 6670 (OEM) 1GB vs Radeon RX 580

Intro

Compare those specifications to the Radeon RX 580, which features core speeds of 1257 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2304 SPUs as well as 144 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
Radeon RX 580		185 Watts
	Difference: 122 Watts (194%)

Memory Bandwidth

In theory, the Radeon RX 580 is 310% quicker than the Radeon HD 6670 (OEM) 1GB overall, because of its greater bandwidth. (explain)

Radeon RX 580		262144 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 198144 (310%)

Texel Rate

The Radeon RX 580 is a lot (approximately 843%) faster with regards to AF than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 161808 (843%)

Pixel Rate

The Radeon RX 580 will be much (approximately 529%) faster with regards to FSAA than the Radeon HD 6670 (OEM) 1GB, and able to handle higher resolutions while still performing well. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 33824 (529%)

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 maximum amount of information (measured in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.