Radeon HD 3850 256MB vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which features core clock speeds of 1015 MHz on the GPU, and 1100 MHz on the 4096 MB of DDR3 memory. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 3850 256MB should be a lot faster than the Radeon R9 M375 in general. (explain)

Radeon HD 3850 256MB		52992 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 17792 (51%)

Texel Rate

The Radeon R9 M375 will be a lot (about 280%) faster with regards to anisotropic filtering than the Radeon HD 3850 256MB. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 3850 256MB		10688 Mtexels/sec
	Difference: 29912 (280%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 M375 is superior to the Radeon HD 3850 256MB, and very much so. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 3850 256MB		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 maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock 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 also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.