Radeon HD 6670 (OEM) 1GB vs Radeon R9 270

Intro

Compare those specifications to the Radeon R9 270, which uses a 28 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory works at a frequency of 1400 MHz on this particular card. It features 1280 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
Radeon R9 270		150 Watts
	Difference: 87 Watts (138%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 will be 180% quicker than the Radeon HD 6670 (OEM) 1GB in general, because of its higher bandwidth. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 115200 (180%)

Texel Rate

The Radeon R9 270 will be quite a bit (about 275%) more effective at texture filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 52800 (275%)

Pixel Rate

The Radeon R9 270 will be quite a bit (about 350%) better at AA than the Radeon HD 6670 (OEM) 1GB, and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 22400 (350%)

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 (in units of megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the 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 most pixels the video card could possibly record to its 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 clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.