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GeForce GTX 650 vs GeForce GTX 660

Intro

The GeForce GTX 650 features a GPU clock speed of 1058 MHz, and the 2048 MB of GDDR5 memory is set to run at 1250 MHz through a 128-bit bus. It also is comprised of 384 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Compare all of that to the GeForce GTX 660, which has a clock speed of 980 MHz and a GDDR5 memory frequency of 1502 MHz. It also uses a 192-bit bus, and makes use of a 28 nm design. It is made up of 960 SPUs, 80 TAUs, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce GTX 660 140 Watts
Difference: 76 Watts (119%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 660 should in theory be quite a bit better than the GeForce GTX 650 in general. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 64192 (80%)

Texel Rate

The GeForce GTX 660 should be a lot (about 132%) better at AF than the GeForce GTX 650. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 44544 (132%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 660 is a better choice, by far. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 6592 (39%)

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

GeForce GTX 660

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 GeForce GTX 660
Manufacturer nVidia nVidia
Year September 2012 September 2012
Code Name GK107 GK106
Memory 2048 MB 2048 MB
Core Speed 1058 MHz 980 MHz
Memory Speed 5000 MHz 6008 MHz
Power (Max TDP) 64 watts 140 watts
Bandwidth 80000 MB/sec 144192 MB/sec
Texel Rate 33856 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 384 960
Texture Mapping Units 32 80
Render Output Units 16 24
Bus Type GDDR5 GDDR5
Bus Width 128-bit 192-bit
Fab Process 28 nm 28 nm
Transistors 1300 million 2540 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 maximum amount of data (counted in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Comments

16 Responses to “GeForce GTX 650 vs GeForce GTX 660”
Compare says:

This is a good comparison of GeForce GTX 650 vs GeForce GTX 660

Compare says:

This is not a good comparison of GeForce GTX 650 vs GeForce GTX 660

Compare says:

I have conflicting emotions about whether this is a good comparison of GeForce GTX 650 vs GeForce GTX 660

compare says:

This is/isn't a good comparison of GeForce GTX 650 vs GeForce GTX 660 at same time!

Compare says:

This is a mildy awesome comparison of Geforce GTX 650 vs GeForce GTX 660

Compare says:

This comparison of Geforce GTX 650 vs GeForce GTX 660 has potential but must try harder

Compare says:

This comparison of Geforce GTX 650 vs GeForce GTX 660 is a comparison.

Erbil says:

Och du Jockel sach bloss -.-

Compare says:

This comparison of Geforce GTX 650 vs GeForce GTX 660 is worth a nutsack.

Viprus says:

I'm Commander Shepard and this is my favorite comparison of Geforce GTX 650 vs GeForce GTX 660 on the Citadel.

Somebuyd says:

Vhat das da fox say ? 660 dingoring

Compare says:

A good comparison of GeForce GTX 650 vs Geforce GTX 660 or not, this is.

Compare says:

This is a comparison.

trent says:

I wonder about the performance of the 650SC vs 660...

Stephen says:

This comparison could be compared with other comparisons, including comparisons of the GTX 650 and 660.

Jeffrey says:

Take it from someone who upgraded from a 9800gt to a GTX650 to a GTX660. The first upgrade was a slight improvement (rather disappointing in fact). But the jump from the 650 to the 660 was huge! Hello 1080 gaming!

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