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GeForce GTX 650 Ti vs GeForce GTX 660 Ti

Intro

The GeForce GTX 650 Ti features a clock speed of 928 MHz and a GDDR5 memory frequency of 1350 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 768 SPUs, 64 TAUs, and 16 Raster Operation Units.

Compare all that to the GeForce GTX 660 Ti, which comes with a core clock frequency of 915 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 192-bit memory bus, and uses a 28 nm design. It features 1344 SPUs, 112 Texture Address Units, and 24 Raster Operation Units.

(No game benchmarks for this combination yet.)

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

The GeForce GTX 660 Ti should in theory perform a lot faster than the GeForce GTX 650 Ti overall. (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 should be quite a bit (more or less 73%) faster with regards to anisotropic 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 using a high screen resolution is important to you, then the GeForce GTX 660 Ti is a better choice, and very much so. (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

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 GTX 650 Ti

Amazon.com

Other US-based stores

GeForce GTX 660 Ti

Amazon.com

Other US-based stores

Specifications

Model GeForce GTX 650 Ti GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year October 2012 August 2012
Code Name GK106 GK104
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 1024 MB 2048 MB
Core Speed 928 MHz 915 MHz
Shader Speed 928 MHz 915 MHz
Memory Speed 1350 MHz (5400 MHz effective) 1500 MHz (6000 MHz effective)
Unified Shaders 768 1344
Texture Mapping Units 64 112
Render Output Units 16 24
Bus Type GDDR5 GDDR5
Bus Width 128-bit 192-bit
DirectX Version DirectX 11.1 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.3
Power (Max TDP) 110 watts 150 watts
Shader Model 5.0 5.0
Bandwidth 86400 MB/sec 144000 MB/sec
Texel Rate 59392 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 14848 Mpixels/sec 21960 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core clock 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

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