Radeon HD 7950 3GB vs Radeon R9 M385X

Intro

Compare 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 RAM. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 7950 3GB should in theory be quite a bit better than the Radeon R9 M385X overall. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 144000 (150%)

Texel Rate

The Radeon HD 7950 3GB is a lot (about 45%) more effective at anisotropic filtering than the Radeon R9 M385X. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 28000 (45%)

Pixel Rate

The Radeon HD 7950 3GB should be quite a bit (approximately 45%) more effective at full screen anti-aliasing than the Radeon R9 M385X, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 7950 3GB		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: Bandwidth is the max amount of data (counted in MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated 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 video card will be at 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 that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also 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, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.