Radeon HD 6950 2GB vs Radeon R9 M385X

Intro

Compare all of that to the Radeon R9 M385X, which has core speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 6950 2GB should theoretically be quite a bit better than the Radeon R9 M385X overall. (explain)

Radeon HD 6950 2GB		160000 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 64000 (67%)

Texel Rate

The Radeon HD 6950 2GB will be just a bit (more or less 14%) better at anisotropic filtering than the Radeon R9 M385X. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 8800 (14%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6950 2GB is superior to the Radeon R9 M385X, by far. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 8000 (45%)

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 largest amount of data (measured in MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.