Radeon HD 3850 1GB vs Radeon R9 M375

Intro

Compare that to the Radeon R9 M375, which has a core clock speed of 1015 MHz and a DDR3 memory frequency of 1100 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 3850 1GB should in theory be quite a bit superior to the Radeon R9 M375 in general. (explain)

Radeon HD 3850 1GB		52992 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 17792 (51%)

Texel Rate

The Radeon R9 M375 should be much (more or less 280%) more effective at anisotropic filtering than the Radeon HD 3850 1GB. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 3850 1GB		10688 Mtexels/sec
	Difference: 29912 (280%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M375 is superior to the Radeon HD 3850 1GB, and very much so. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 3850 1GB		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: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated 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 drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.