Radeon R9 295X2 vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which comes with a GPU core clock speed of 1100 MHz, and 4096 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 295X2 will be 567% faster than the Radeon R9 M385X in general, due to its greater data rate. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 544000 (567%)

Texel Rate

The Radeon R9 295X2 will be quite a bit (more or less 482%) faster with regards to AF than the Radeon R9 M385X. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 296736 (482%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 295X2 is a better choice, and very much so. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 112704 (640%)

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 within a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of 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.