Radeon HD 3850 X2 vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which makes use of a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 memory is set to run at a frequency of 1250 MHz on this specific model. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should theoretically be a lot better than the Radeon HD 3850 X2 overall. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 3850 X2		105984 MB/sec
	Difference: 54016 (51%)

Texel Rate

The Radeon R9 M395X will be much (more or less 333%) faster with regards to anisotropic filtering than the Radeon HD 3850 X2. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 3850 X2		21376 Mtexels/sec
	Difference: 71168 (333%)

Pixel Rate

The Radeon R9 M395X should be a little bit (about 8%) more effective at FSAA than the Radeon HD 3850 X2, and able to handle higher screen resolutions better. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon HD 3850 X2		21376 Mpixels/sec
	Difference: 1760 (8%)

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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.