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Radeon R9 M295X vs Radeon RX 470

Intro

The Radeon R9 M295X has a GPU core speed of 750 MHz, and the 4096 MB of GDDR5 memory is set to run at 1375 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Compare all of that to the Radeon RX 470, which comes with a clock frequency of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also features a 256-bit memory bus, and uses a 14 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470		120 Watts
Radeon R9 M295X		125 Watts
	Difference: 5 Watts (4%)

Memory Bandwidth

Theoretically, the Radeon RX 470 should be a little bit faster than the Radeon R9 M295X overall. (explain)

Radeon RX 470		211200 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 35200 (20%)

Texel Rate

The Radeon RX 470 will be a lot (approximately 23%) more effective at texture filtering than the Radeon R9 M295X. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 22528 (23%)

Pixel Rate

The Radeon RX 470 will be much (approximately 23%) more effective at full screen anti-aliasing than the Radeon R9 M295X, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon RX 470		29632 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 5632 (23%)

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.

Price Comparison

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Radeon R9 M295X

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Radeon RX 470

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Specifications

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Model	Radeon R9 M295X	Radeon RX 470
Manufacturer	AMD	AMD
Year	2014	August 2016
Code Name	Unknown	Polaris 10
Memory	4096 MB	8192 MB
Core Speed	750 MHz	926 MHz
Memory Speed	5500 MHz	6600 MHz
Power (Max TDP)	125 watts	120 watts
Bandwidth	176000 MB/sec	211200 MB/sec
Texel Rate	96000 Mtexels/sec	118528 Mtexels/sec
Pixel Rate	24000 Mpixels/sec	29632 Mpixels/sec
Unified Shaders	2048	2048
Texture Mapping Units	128	128
Render Output Units	32	32
Bus Type	GDDR5	GDDR5
Bus Width	256-bit	256-bit
Fab Process	28 nm	14 nm
Transistors	(Unknown) million	5700 million
Bus	PCIe 3.0 x16	PCIe 3.0 x16
DirectX Version	DirectX 11.2	DirectX 12.0
OpenGL Version	OpenGL 4.3	OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

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