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GeForce GTX 650 vs GeForce GTX 660

Intro

The GeForce GTX 650 comes with core clock speeds of 1058 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 384 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Compare all that to the GeForce GTX 660, which comes with a GPU core clock speed of 980 MHz, and 2048 MB of GDDR5 RAM set to run at 1502 MHz through a 192-bit bus. It also is made up of 960 Stream Processors, 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

Performance-wise, the GeForce GTX 660 should theoretically be a lot better 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 should be much (approximately 132%) more effective 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 the winner, by a large margin. (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 1024 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 maximum amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at 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 chip could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - 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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