Radeon HD 3850 X2 vs Radeon R7 M265

Intro

Compare that to the Radeon R7 M265, which comes with GPU clock speed of 725 MHz, and 2048 MB of DDR3 memory running at 1000 MHz through a 128-bit bus. It also features 384 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3850 X2, in theory, should be quite a bit faster than the Radeon R7 M265 in general. (explain)

Radeon HD 3850 X2		105984 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 73984 (231%)

Texel Rate

The Radeon HD 3850 X2 will be much (more or less 23%) faster with regards to texture filtering than the Radeon R7 M265. (explain)

Radeon HD 3850 X2		21376 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 3976 (23%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 3850 X2 is the winner, and very much so. (explain)

Radeon HD 3850 X2		21376 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 15576 (269%)

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 largest amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.