Radeon HD 6950 2GB vs Radeon R9 M375X

Intro

Compare that to the Radeon R9 M375X, which makes use of a 28 nm design. AMD has set the core speed at 1015 MHz. The GDDR5 RAM works at a speed of 1125 MHz on this model. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 6950 2GB is 122% quicker than the Radeon R9 M375X overall, because of its higher data rate. (explain)

Radeon HD 6950 2GB		160000 MB/sec
Radeon R9 M375X		72000 MB/sec
	Difference: 88000 (122%)

Texel Rate

The Radeon HD 6950 2GB will be quite a bit (approximately 73%) faster with regards to anisotropic filtering than the Radeon R9 M375X. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
Radeon R9 M375X		40600 Mtexels/sec
	Difference: 29800 (73%)

Pixel Rate

The Radeon HD 6950 2GB will be much (about 58%) faster with regards to AA than the Radeon R9 M375X, and will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
Radeon R9 M375X		16240 Mpixels/sec
	Difference: 9360 (58%)

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 max amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.