Radeon R9 295X2 vs Radeon R9 M395X

Intro

Compare those specifications to the Radeon R9 M395X, which features a core clock frequency of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
Radeon R9 295X2		500 Watts
	Difference: 375 Watts (300%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 295X2 will be 300% quicker than the Radeon R9 M395X in general, because of its higher data rate. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 480000 (300%)

Texel Rate

The Radeon R9 295X2 is much (approximately 287%) more effective at anisotropic filtering than the Radeon R9 M395X. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 265792 (287%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 295X2 is a better choice, by far. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 107168 (463%)

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 data (in units of megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.