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GeForce GTX 550 Ti vs GeForce GTX 560 Ti 448

Intro

The GeForce GTX 550 Ti has a clock frequency of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also makes use of a 192-bit bus, and makes use of a 40 nm design. It is made up of 192 SPUs, 32 Texture Address Units, and 24 Raster Operation Units.

Compare those specs to the GeForce GTX 560 Ti 448, which makes use of a 40 nm design. nVidia has clocked the core frequency at 732 MHz. The GDDR5 memory is set to run at a speed of 900 MHz on this card. It features 448 SPUs along with 56 Texture Address Units and 40 Rasterization Operator Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 560 Ti 448		4200 points
GeForce GTX 550 Ti		1897 points
	Difference: 2303 (121%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti		116 Watts
GeForce GTX 560 Ti 448		210 Watts
	Difference: 94 Watts (81%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 Ti 448 is 46% quicker than the GeForce GTX 550 Ti overall, due to its higher bandwidth. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
GeForce GTX 550 Ti		98496 MB/sec
	Difference: 45504 (46%)

Texel Rate

The GeForce GTX 560 Ti 448 will be quite a bit (approximately 42%) better at texture filtering than the GeForce GTX 550 Ti. (explain)

GeForce GTX 560 Ti 448		40992 Mtexels/sec
GeForce GTX 550 Ti		28800 Mtexels/sec
	Difference: 12192 (42%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 560 Ti 448 is the winner, by a large margin. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
GeForce GTX 550 Ti		21600 Mpixels/sec
	Difference: 7680 (36%)

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 550 Ti

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GeForce GTX 560 Ti 448

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Specifications

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Model	GeForce GTX 550 Ti	GeForce GTX 560 Ti 448
Manufacturer	nVidia	nVidia
Year	March 2011	December 2011
Code Name	GF116	GF110
Memory	1024 MB	1280 MB
Core Speed	900 MHz	732 MHz
Memory Speed	4104 MHz	3600 MHz
Power (Max TDP)	116 watts	210 watts
Bandwidth	98496 MB/sec	144000 MB/sec
Texel Rate	28800 Mtexels/sec	40992 Mtexels/sec
Pixel Rate	21600 Mpixels/sec	29280 Mpixels/sec
Unified Shaders	192	448
Texture Mapping Units	32	56
Render Output Units	24	40
Bus Type	GDDR5	GDDR5
Bus Width	192-bit	320-bit
Fab Process	40 nm	40 nm
Transistors	1170 million	3000 million
Bus	PCIe 2.1 x16	PCIe 2.0 x16
DirectX Version	DirectX 11	DirectX 11
OpenGL Version	OpenGL 4.1	OpenGL 4.2

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported past the external memory interface in one second. It is worked out 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 it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that can be applied per second. This is calculated 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the 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 - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends 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 max fill rate.

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