Radeon HD 6670 (OEM) 1GB vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which comes with a clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 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 R9 M395X		125 Watts
	Difference: 62 Watts (98%)

Memory Bandwidth

The Radeon R9 M395X, in theory, should be quite a bit faster than the Radeon HD 6670 (OEM) 1GB overall. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 96000 (150%)

Texel Rate

The Radeon R9 M395X will be quite a bit (about 382%) faster with regards to AF than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 73344 (382%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 M395X is a better choice, by far. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 16736 (262%)

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 data (counted in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the graphics 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 amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.