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GeForce GTX 660 vs Geforce GTX 760

Intro

The GeForce GTX 660 comes with a clock speed of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 192-bit memory bus, and makes use of a 28 nm design. It is made up of 960 SPUs, 80 TAUs, and 24 Raster Operation Units.

Compare all that to the Geforce GTX 760, which comes with a clock speed of 980 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It features 1152 SPUs, 96 Texture Address Units, and 32 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
Geforce GTX 760 170 Watts
Difference: 30 Watts (21%)

Memory Bandwidth

Performance-wise, the Geforce GTX 760 should in theory be a lot better than the GeForce GTX 660 overall. (explain)

Geforce GTX 760 192256 MB/sec
GeForce GTX 660 144192 MB/sec
Difference: 48064 (33%)

Texel Rate

The Geforce GTX 760 is a bit (more or less 20%) faster with regards to AF than the GeForce GTX 660. (explain)

Geforce GTX 760 94080 Mtexels/sec
GeForce GTX 660 78400 Mtexels/sec
Difference: 15680 (20%)

Pixel Rate

The Geforce GTX 760 will be much (about 33%) faster with regards to anti-aliasing than the GeForce GTX 660, and also should be able to handle higher resolutions without slowing down too much. (explain)

Geforce GTX 760 31360 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 7840 (33%)

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

GeForce GTX 660

Amazon.com

Geforce GTX 760

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

Model GeForce GTX 660 Geforce GTX 760
Manufacturer nVidia nVidia
Year September 2012 June 2013
Code Name GK106 GK104
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 2048 MB
Core Speed 980 MHz 980 MHz
Shader Speed 980 MHz 980 MHz
Memory Speed 1502 MHz (6008 MHz effective) 1502 MHz (6008 MHz effective)
Unified Shaders 960 1152
Texture Mapping Units 80 96
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
DirectX Version DirectX 11.0 DirectX 11.0
OpenGL Version OpenGL 4.3 OpenGL 4.3
Power (Max TDP) 140 watts 170 watts
Shader Model 5.0 5.0
Bandwidth 144192 MB/sec 192256 MB/sec
Texel Rate 78400 Mtexels/sec 94080 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 31360 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 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 clock 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 in one second.

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

Comments

3 Responses to “GeForce GTX 660 vs Geforce GTX 760”
Schaumstoff says:
The gtx 760 is a lot more expensive but I think it is worth it.
Dat guy says:
At current UK prices the 760 is around 30 pounds more expensive than the 660 and I'd be happy to spend that much for the performance gain.
Jessy says:
I shouldv'e gotten this 760. But at the time, I just needed a new GPU when mine was a 610... -_- But I do intend to get a new one soon so we'll see. :)

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