Radeon HD 6750 vs Radeon R9 270

Intro

Compare those specs to the Radeon R9 270, which features GPU core speed of 900 MHz, and 2048 MB of GDDR5 memory running at 1400 MHz through a 256-bit bus. It also features 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon R9 270		150 Watts
	Difference: 64 Watts (74%)

Memory Bandwidth

Theoretically, the Radeon R9 270 should be quite a bit faster than the Radeon HD 6750 in general. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 115200 (180%)

Texel Rate

The Radeon R9 270 will be a lot (about 176%) faster with regards to AF than the Radeon HD 6750. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 45900 (176%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 270 is the winner, by far. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 17200 (148%)

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 largest amount of information (measured in megabytes per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs 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 rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.