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GeForce 825M vs GeForce GTX 850M

Intro

The GeForce 825M comes with a GPU core clock speed of 850 MHz, and the 2048 MB of DDR3 memory runs at 900 MHz through a 64-bit bus. It also is made up of 384 Stream Processors, 16 Texture Address Units, and 8 Raster Operation Units.

Compare those specifications to the GeForce GTX 850M, which comes with core clock speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M 33 Watts
GeForce GTX 850M 40 Watts
Difference: 7 Watts (21%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 850M should theoretically be a lot superior to the GeForce 825M overall. (explain)

GeForce GTX 850M 32000 MB/sec
GeForce 825M 14400 MB/sec
Difference: 17600 (122%)

Texel Rate

The GeForce GTX 850M will be much (approximately 158%) faster with regards to texture filtering than the GeForce 825M. (explain)

GeForce GTX 850M 35040 Mtexels/sec
GeForce 825M 13600 Mtexels/sec
Difference: 21440 (158%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 850M is superior to the GeForce 825M, by far. (explain)

GeForce GTX 850M 14016 Mpixels/sec
GeForce 825M 6800 Mpixels/sec
Difference: 7216 (106%)

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 825M

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.

Specifications

Display Specifications

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Model GeForce 825M GeForce GTX 850M
Manufacturer nVidia nVidia
Year January 27 2014 March 12 2014
Code Name GK208 GM107
Memory 2048 MB 2048 MB
Core Speed 850 MHz 876 MHz
Memory Speed 1800 MHz 2000 MHz
Power (Max TDP) 33 watts 40 watts
Bandwidth 14400 MB/sec 32000 MB/sec
Texel Rate 13600 Mtexels/sec 35040 Mtexels/sec
Pixel Rate 6800 Mpixels/sec 14016 Mpixels/sec
Unified Shaders 384 640
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 x8 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce 825M

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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