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GeForce GTX 650 vs GeForce GTX 660

Intro

The GeForce GTX 650 makes use of a 28 nm design. nVidia has clocked the core frequency at 1058 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this card. It features 384 SPUs as well as 32 TAUs and 16 ROPs.

Compare all of that to the GeForce GTX 660, which has core speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 960 SPUs as well as 80 Texture Address Units 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

The GeForce GTX 660 should in theory perform much faster than the GeForce GTX 650 overall. (explain)

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

Texel Rate

The GeForce GTX 660 will be a lot (about 132%) more effective at anisotropic filtering 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 screen 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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum 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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