Radeon HD 3850 512MB vs Radeon R9 M375

Intro

Compare that to the Radeon R9 M375, which comes with a GPU core clock speed of 1015 MHz, and 4096 MB of DDR3 memory running at 1100 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3850 512MB should be 51% quicker than the Radeon R9 M375 overall, due to its greater data rate. (explain)

Radeon HD 3850 512MB		52992 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 17792 (51%)

Texel Rate

The Radeon R9 M375 will be quite a bit (approximately 280%) more effective at texture filtering than the Radeon HD 3850 512MB. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 3850 512MB		10688 Mtexels/sec
	Difference: 29912 (280%)

Pixel Rate

The Radeon R9 M375 is much (more or less 52%) better at AA than the Radeon HD 3850 512MB, and will be able to handle higher resolutions more effectively. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 3850 512MB		10688 Mpixels/sec
	Difference: 5552 (52%)

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 information (measured in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a 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 - 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 many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.