Radeon R9 M295X vs Radeon R9 M385X

Intro

Compare those specs to the Radeon R9 M385X, which features clock 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

In theory, the Radeon R9 M295X will be 83% quicker than the Radeon R9 M385X overall, because of its higher bandwidth. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 80000 (83%)

Texel Rate

The Radeon R9 M295X is much (about 56%) more effective at texture filtering than the Radeon R9 M385X. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 34400 (56%)

Pixel Rate

The Radeon R9 M295X will be quite a bit (approximately 36%) faster with regards to anti-aliasing than the Radeon R9 M385X, and capable of handling higher resolutions better. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 6400 (36%)

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 maximum amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 amount of texture map elements (texels) that can be processed per second. This 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 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 could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.