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GeForce GTX 465 vs GeForce GTX 660 Ti

Intro

The GeForce GTX 465 features a GPU core clock speed of 607 MHz, and the 1024 MB of GDDR5 RAM is set to run at 802 MHz through a 256-bit bus. It also is comprised of 352 Stream Processors, 44 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the GeForce GTX 660 Ti, which has a clock speed of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 192-bit memory bus, and makes use of a 28 nm design. It is comprised of 1344 SPUs, 112 Texture Address Units, and 24 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
GeForce GTX 465		200 Watts
	Difference: 50 Watts (33%)

Memory Bandwidth

The GeForce GTX 660 Ti should theoretically perform much faster than the GeForce GTX 465 in general. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 41408 (40%)

Texel Rate

The GeForce GTX 660 Ti should be much (approximately 284%) more effective at texture filtering than the GeForce GTX 465. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 75772 (284%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 660 Ti is the winner, but only just. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 2536 (13%)

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 465

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GeForce GTX 660 Ti

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Specifications

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Model	GeForce GTX 465	GeForce GTX 660 Ti
Manufacturer	nVidia	nVidia
Year	May 2010	August 2012
Code Name	GF100	GK104
Memory	1024 MB	2048 MB
Core Speed	607 MHz	915 MHz
Memory Speed	3208 MHz	6000 MHz
Power (Max TDP)	200 watts	150 watts
Bandwidth	102592 MB/sec	144000 MB/sec
Texel Rate	26708 Mtexels/sec	102480 Mtexels/sec
Pixel Rate	19424 Mpixels/sec	21960 Mpixels/sec
Unified Shaders	352	1344
Texture Mapping Units	44	112
Render Output Units	32	24
Bus Type	GDDR5	GDDR5
Bus Width	256-bit	192-bit
Fab Process	40 nm	28 nm
Transistors	3000 million	3540 million
Bus	PCIe x16	PCIe 3.0 x16
DirectX Version	DirectX 11	DirectX 11.0
OpenGL Version	OpenGL 4.1	OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units 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 lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

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