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GeForce GTX 850M vs Geforce GTX 680

Intro

The GeForce GTX 850M features a GPU core clock speed of 876 MHz, and the 2048 MB of DDR3 memory is set to run at 1000 MHz through a 128-bit bus. It also features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Compare all that to the Geforce GTX 680, which has core clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 128 TAUs and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 680 7650 points
GeForce GTX 850M 3340 points
Difference: 4310 (129%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
Geforce GTX 680 195 Watts
Difference: 155 Watts (388%)

Memory Bandwidth

Theoretically, the Geforce GTX 680 should perform much faster than the GeForce GTX 850M overall. (explain)

Geforce GTX 680 192256 MB/sec
GeForce GTX 850M 32000 MB/sec
Difference: 160256 (501%)

Texel Rate

The Geforce GTX 680 will be much (about 267%) better at anisotropic filtering than the GeForce GTX 850M. (explain)

Geforce GTX 680 128768 Mtexels/sec
GeForce GTX 850M 35040 Mtexels/sec
Difference: 93728 (267%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Geforce GTX 680 is a better choice, by far. (explain)

Geforce GTX 680 32192 Mpixels/sec
GeForce GTX 850M 14016 Mpixels/sec
Difference: 18176 (130%)

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 850M

Amazon.com

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Geforce GTX 680

Amazon.com

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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 850M Geforce GTX 680
Manufacturer nVidia nVidia
Year March 12 2014 March 2012
Code Name GM107 GK104
Memory 2048 MB 2048 MB
Core Speed 876 MHz 1006 MHz
Memory Speed 2000 MHz 6008 MHz
Power (Max TDP) 40 watts 195 watts
Bandwidth 32000 MB/sec 192256 MB/sec
Texel Rate 35040 Mtexels/sec 128768 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 32192 Mpixels/sec
Unified Shaders 640 1536
Texture Mapping Units 40 128
Render Output Units 16 32
Bus Type DDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 3540 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 11.0
OpenGL Version OpenGL 4.5 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher 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 maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 850M

Amazon.com

Check prices at:

Geforce GTX 680

Amazon.com

Check prices at:

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.

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