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GeForce GTX 470 vs Radeon R9 M395X

Intro

The GeForce GTX 470 has clock speeds of 607 MHz on the GPU, and 837 MHz on the 1280 MB of GDDR5 RAM. It features 448 SPUs along with 56 TAUs and 40 Rasterization Operator Units.

Compare 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 RAM runs at a frequency of 1250 MHz on this card. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce GTX 470		215 Watts
	Difference: 90 Watts (72%)

Memory Bandwidth

Theoretically, the Radeon R9 M395X should be a bit faster than the GeForce GTX 470 overall. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GTX 470		133920 MB/sec
	Difference: 26080 (19%)

Texel Rate

The Radeon R9 M395X should be quite a bit (approximately 172%) faster with regards to anisotropic filtering than the GeForce GTX 470. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 58552 (172%)

Pixel Rate

The GeForce GTX 470 will be a little bit (about 5%) more effective at anti-aliasing than the Radeon R9 M395X, and also should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 1144 (5%)

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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GeForce GTX 470

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Radeon R9 M395X

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Specifications

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Model	GeForce GTX 470	Radeon R9 M395X
Manufacturer	nVidia	AMD
Year	March 2010	2015
Code Name	GF100	Tonga
Memory	1280 MB	4096 MB
Core Speed	607 MHz	723 MHz
Memory Speed	3348 MHz	5000 MHz
Power (Max TDP)	215 watts	125 watts
Bandwidth	133920 MB/sec	160000 MB/sec
Texel Rate	33992 Mtexels/sec	92544 Mtexels/sec
Pixel Rate	24280 Mpixels/sec	23136 Mpixels/sec
Unified Shaders	448	2048
Texture Mapping Units	56	128
Render Output Units	40	32
Bus Type	GDDR5	GDDR5
Bus Width	320-bit	256-bit
Fab Process	40 nm	28 nm
Transistors	3000 million	(Unknown) million
Bus	PCIe x16	PCIe 3.0 x16
DirectX Version	DirectX 11	DirectX 12
OpenGL Version	OpenGL 4.1	OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it must 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

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