Radeon HD 6850 vs Radeon R9 M395X

Intro

Compare all that to the Radeon R9 M395X, which has core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
Radeon HD 6850		127 Watts
	Difference: 2 Watts (2%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M395X is 25% quicker than the Radeon HD 6850 overall, due to its higher bandwidth. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 6850		128000 MB/sec
	Difference: 32000 (25%)

Texel Rate

The Radeon R9 M395X should be quite a bit (approximately 149%) more effective at anisotropic filtering than the Radeon HD 6850. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 6850		37200 Mtexels/sec
	Difference: 55344 (149%)

Pixel Rate

The Radeon HD 6850 should be a bit (about 7%) better at anti-aliasing than the Radeon R9 M395X, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 6850		24800 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 1664 (7%)

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 is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. 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 lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.