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GeForce GTX 560 Ti 448 vs Radeon R9 M395X

Intro

The GeForce GTX 560 Ti 448 has a clock speed of 732 MHz and a GDDR5 memory speed of 900 MHz. It also uses a 320-bit bus, and uses a 40 nm design. It features 448 SPUs, 56 Texture Address Units, and 40 ROPs.

Compare all of that to the Radeon R9 M395X, which comes with a clock speed of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce GTX 560 Ti 448		210 Watts
	Difference: 85 Watts (68%)

Memory Bandwidth

The Radeon R9 M395X, in theory, should perform a bit faster than the GeForce GTX 560 Ti 448 in general. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GTX 560 Ti 448		144000 MB/sec
	Difference: 16000 (11%)

Texel Rate

The Radeon R9 M395X will be quite a bit (about 126%) more effective at AF than the GeForce GTX 560 Ti 448. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTX 560 Ti 448		40992 Mtexels/sec
	Difference: 51552 (126%)

Pixel Rate

The GeForce GTX 560 Ti 448 is a lot (about 27%) faster with regards to anti-aliasing than the Radeon R9 M395X, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 6144 (27%)

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 560 Ti 448

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Radeon R9 M395X

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Specifications

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Model	GeForce GTX 560 Ti 448	Radeon R9 M395X
Manufacturer	nVidia	AMD
Year	December 2011	2015
Code Name	GF110	Tonga
Memory	1280 MB	4096 MB
Core Speed	732 MHz	723 MHz
Memory Speed	3600 MHz	5000 MHz
Power (Max TDP)	210 watts	125 watts
Bandwidth	144000 MB/sec	160000 MB/sec
Texel Rate	40992 Mtexels/sec	92544 Mtexels/sec
Pixel Rate	29280 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 2.0 x16	PCIe 3.0 x16
DirectX Version	DirectX 11	DirectX 12
OpenGL Version	OpenGL 4.2	OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could 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 the core 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 rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

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