Radeon HD 6950 vs Radeon R9 M270X

Intro

Compare those specs to the Radeon R9 M270X, which comes with a clock frequency of 725 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 6950 should be much faster than the Radeon R9 M270X in general. (explain)

Radeon HD 6950		160000 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 88000 (122%)

Texel Rate

The Radeon HD 6950 is quite a bit (approximately 143%) better at texture filtering than the Radeon R9 M270X. (explain)

Radeon HD 6950		70400 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 41400 (143%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6950 is superior to the Radeon R9 M270X, and very much so. (explain)

Radeon HD 6950		25600 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 14000 (121%)

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

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.