GeForce GTS 450 vs GeForce GTX 660 Ti

Intro

The GeForce GTS 450 has a GPU core speed of 783 MHz, and the 512 MB of GDDR5 memory runs at 902 MHz through a 128-bit bus. It also is made up of 192 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare all of that to the GeForce GTX 660 Ti, which has GPU clock speed of 915 MHz, and 2048 MB of GDDR5 RAM set to run at 1500 MHz through a 192-bit bus. It also is made up of 1344 Stream Processors, 112 TAUs, and 24 Raster Operation Units.

Price Comparison

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce GTS 450 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

GeForce GTX 660 Ti Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce GTS 450	GeForce GTX 660 Ti
Manufacturer	nVidia	nVidia
Year	September 2010	August 2012
Code Name	GF106	GK104
Fab Process	40 nm	28 nm
Bus	PCIe x16	PCIe 3.0 x16
Memory	512 MB	2048 MB
Core Speed	783 MHz	915 MHz
Shader Speed	1566 MHz	915 MHz
Memory Speed	902 MHz (3608 MHz effective)	1500 MHz (6000 MHz effective)
Unified Shaders	192	1344
Texture Mapping Units	32	112
Render Output Units	16	24
Bus Type	GDDR5	GDDR5
Bus Width	128-bit	192-bit
DirectX Version	DirectX 11	DirectX 11.1
OpenGL Version	OpenGL 4.1	OpenGL 4.3
Power (Max TDP)	106 watts	150 watts
Shader Model	5.0	5.0
Bandwidth	57728 MB/sec	144000 MB/sec
Texel Rate	25056 Mtexels/sec	102480 Mtexels/sec
Pixel Rate	12528 Mpixels/sec	21960 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 are processed in one second. This is worked out by multiplying the total texture units 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 in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.