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GeForce 830M vs GeForce GTX 850M

Intro

The GeForce 830M features clock speeds of 1029 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 256 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

Compare those specs to the GeForce GTX 850M, which features a GPU core clock speed of 876 MHz, and 2048 MB of DDR3 RAM running at 1000 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M 25 Watts
GeForce GTX 850M 40 Watts
Difference: 15 Watts (60%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 850M should perform a lot faster than the GeForce 830M overall. (explain)

GeForce GTX 850M 32000 MB/sec
GeForce 830M 14400 MB/sec
Difference: 17600 (122%)

Texel Rate

The GeForce GTX 850M should be much (about 113%) more effective at anisotropic filtering than the GeForce 830M. (explain)

GeForce GTX 850M 35040 Mtexels/sec
GeForce 830M 16464 Mtexels/sec
Difference: 18576 (113%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 850M is the winner, and very much so. (explain)

GeForce GTX 850M 14016 Mpixels/sec
GeForce 830M 8232 Mpixels/sec
Difference: 5784 (70%)

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 830M

Amazon.com

Check prices at:

GeForce GTX 850M

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 830M GeForce GTX 850M
Manufacturer nVidia nVidia
Year March 12 2014 March 12 2014
Code Name GM108 GM107
Memory 2048 MB 2048 MB
Core Speed 1029 MHz 876 MHz
Memory Speed 1800 MHz 2000 MHz
Power (Max TDP) 25 watts 40 watts
Bandwidth 14400 MB/sec 32000 MB/sec
Texel Rate 16464 Mtexels/sec 35040 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 14016 Mpixels/sec
Unified Shaders 256 640
Texture Mapping Units 16 40
Render Output Units 8 16
Bus Type DDR3 DDR3
Bus Width 64-bit 128-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant 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 maximum fill rate.

Display Prices

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GeForce 830M

Amazon.com

Check prices at:

GeForce GTX 850M

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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