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GeForce GTX 650 Ti vs GeForce GTX 660 Ti


Intro

The GeForce GTX 650 Ti uses a 28 nm design. nVidia has set the core speed at 928 MHz. The GDDR5 RAM is set to run at a frequency of 1350 MHz on this model. It features 768 SPUs along with 64 Texture Address Units and 16 ROPs.

Compare those specs to the GeForce GTX 660 Ti, which features a core clock speed of 915 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 192-bit bus, and uses a 28 nm design. It features 1344 SPUs, 112 TAUs, and 24 Raster Operation 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 660 Ti 6010 points
GeForce GTX 650 Ti 3430 points
Difference: 2580 (75%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 110 Watts
GeForce GTX 660 Ti 150 Watts
Difference: 40 Watts (36%)

Memory Bandwidth

In theory, the GeForce GTX 660 Ti should be 67% faster than the GeForce GTX 650 Ti in general, due to its greater bandwidth. (explain)

GeForce GTX 660 Ti 144000 MB/sec
GeForce GTX 650 Ti 86400 MB/sec
Difference: 57600 (67%)

Texel Rate

The GeForce GTX 660 Ti is a lot (approximately 73%) faster with regards to texture filtering than the GeForce GTX 650 Ti. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
GeForce GTX 650 Ti 59392 Mtexels/sec
Difference: 43088 (73%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 660 Ti is superior to the GeForce GTX 650 Ti, by a large margin. (explain)

GeForce GTX 660 Ti 21960 Mpixels/sec
GeForce GTX 650 Ti 14848 Mpixels/sec
Difference: 7112 (48%)

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 650 Ti

Amazon.com

GeForce GTX 660 Ti

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 650 Ti GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year October 2012 August 2012
Code Name GK106 GK104
Memory 1024 MB 2048 MB
Core Speed 928 MHz 915 MHz
Memory Speed 5400 MHz 6000 MHz
Power (Max TDP) 110 watts 150 watts
Bandwidth 86400 MB/sec 144000 MB/sec
Texel Rate 59392 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 14848 Mpixels/sec 21960 Mpixels/sec
Unified Shaders 768 1344
Texture Mapping Units 64 112
Render Output Units 16 24
Bus Type GDDR5 GDDR5
Bus Width 128-bit 192-bit
Fab Process 28 nm 28 nm
Transistors 2540 million 3540 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.0
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 650 Ti

Amazon.com

GeForce GTX 660 Ti

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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