Radeon HD 3850 X2 vs Radeon R9 M375

Intro

Compare that to the Radeon R9 M375, which comes with a core clock speed of 1015 MHz and a DDR3 memory speed of 1100 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It 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

As far as performance goes, the Radeon HD 3850 X2 should in theory be quite a bit superior to the Radeon R9 M375 overall. (explain)

Radeon HD 3850 X2		105984 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 70784 (201%)

Texel Rate

The Radeon R9 M375 is much (about 90%) more effective at texture filtering than the Radeon HD 3850 X2. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 3850 X2		21376 Mtexels/sec
	Difference: 19224 (90%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 3850 X2 is superior to the Radeon R9 M375, by a large margin. (explain)

Radeon HD 3850 X2		21376 Mpixels/sec
Radeon R9 M375		16240 Mpixels/sec
	Difference: 5136 (32%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the 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 most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 ability to reach the maximum fill rate.