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GeForce GTX 650 vs GeForce GTX 660

Intro

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

Compare all of that to the GeForce GTX 660, which features a clock speed of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 192-bit bus, and uses a 28 nm design. It is comprised of 960 SPUs, 80 TAUs, and 24 Raster Operation Units.

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

In theory, the GeForce GTX 660 should 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 quite a bit (more or less 132%) faster with regards to AF than the GeForce GTX 650. (explain)

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

Pixel Rate

The GeForce GTX 660 is quite a bit (approximately 39%) better at FSAA than the GeForce GTX 650, and also capable of handling higher resolutions while still performing well. (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

GeForce GTX 650

GeForce GTX 660

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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

GeForce GTX 650

GeForce GTX 660

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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