Radeon HD 6670 (OEM) 1GB vs Radeon R9 390X 8G

Intro

Compare that to the Radeon R9 390X 8G, which makes use of a 28 nm design. AMD has set the core speed at 1050 MHz. The GDDR5 memory is set to run at a speed of 1500 MHz on this particular model. It features 2816 SPUs as well as 176 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 212 Watts (337%)

Memory Bandwidth

As far as performance goes, the Radeon R9 390X 8G should theoretically be much better than the Radeon HD 6670 (OEM) 1GB overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 320000 (500%)

Texel Rate

The Radeon R9 390X 8G should be a lot (more or less 863%) faster with regards to texture filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 165600 (863%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 390X 8G is superior to the Radeon HD 6670 (OEM) 1GB, by a large margin. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 60800 (950%)

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 data (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better 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 a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.