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GeForce GTX 650 vs GeForce GTX 660 Ti

Intro

The GeForce GTX 650 uses a 28 nm design. nVidia has clocked the core frequency at 1058 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this particular model. It features 384 SPUs along with 32 Texture Address Units and 16 ROPs.

Compare those specifications to the GeForce GTX 660 Ti, which features a clock frequency of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 192-bit bus, and uses a 28 nm design. It is comprised of 1344 SPUs, 112 Texture Address Units, 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 6013 points
GeForce GTX 650 2263 points
Difference: 3750 (166%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce GTX 660 Ti 150 Watts
Difference: 86 Watts (134%)

Memory Bandwidth

The GeForce GTX 660 Ti should theoretically perform much faster than the GeForce GTX 650 in general. (explain)

GeForce GTX 660 Ti 144000 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 64000 (80%)

Texel Rate

The GeForce GTX 660 Ti should be quite a bit (about 203%) more effective at texture filtering than the GeForce GTX 650. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 68624 (203%)

Pixel Rate

The GeForce GTX 660 Ti is quite a bit (about 30%) more effective at anti-aliasing than the GeForce GTX 650, and will be capable of handling higher resolutions better. (explain)

GeForce GTX 660 Ti 21960 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 5032 (30%)

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

Amazon.com

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GeForce GTX 660 Ti

Amazon.com

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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 GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year September 2012 August 2012
Code Name GK107 GK104
Memory 1024 MB 2048 MB
Core Speed 1058 MHz 915 MHz
Memory Speed 5000 MHz 6000 MHz
Power (Max TDP) 64 watts 150 watts
Bandwidth 80000 MB/sec 144000 MB/sec
Texel Rate 33856 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 21960 Mpixels/sec
Unified Shaders 384 1344
Texture Mapping Units 32 112
Render Output Units 16 24
Bus Type GDDR5 GDDR5
Bus Width 128-bit 192-bit
Fab Process 28 nm 28 nm
Transistors 1300 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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied 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 figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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 - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 650

Amazon.com

Check prices at:

GeForce GTX 660 Ti

Amazon.com

Check prices at:

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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