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GeForce 825M vs GeForce 830M

Intro

The GeForce 825M features a clock speed of 850 MHz and a DDR3 memory frequency of 900 MHz. It also makes use of a 64-bit memory bus, and makes use of a 28 nm design. It features 384 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare all of that to the GeForce 830M, which comes with a GPU core clock speed of 1029 MHz, and 2048 MB of DDR3 RAM set to run at 900 MHz through a 64-bit bus. It also features 256 Stream Processors, 16 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M 25 Watts
GeForce 825M 33 Watts
Difference: 8 Watts (32%)

Memory Bandwidth

Both cards have exactly the same bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The GeForce 830M is a lot (approximately 21%) better at texture filtering than the GeForce 825M. (explain)

GeForce 830M 16464 Mtexels/sec
GeForce 825M 13600 Mtexels/sec
Difference: 2864 (21%)

Pixel Rate

The GeForce 830M should be quite a bit (approximately 21%) more effective at FSAA than the GeForce 825M, and will be capable of handling higher screen resolutions better. (explain)

GeForce 830M 8232 Mpixels/sec
GeForce 825M 6800 Mpixels/sec
Difference: 1432 (21%)

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 830M

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

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Model GeForce 825M GeForce 830M
Manufacturer nVidia nVidia
Year January 27 2014 March 12 2014
Code Name GK208 GM108
Memory 2048 MB 2048 MB
Core Speed 850 MHz 1029 MHz
Memory Speed 1800 MHz 1800 MHz
Power (Max TDP) 33 watts 25 watts
Bandwidth 14400 MB/sec 14400 MB/sec
Texel Rate 13600 Mtexels/sec 16464 Mtexels/sec
Pixel Rate 6800 Mpixels/sec 8232 Mpixels/sec
Unified Shaders 384 256
Texture Mapping Units 16 16
Render Output Units 8 8
Bus Type DDR3 DDR3
Bus Width 64-bit 64-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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video 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 number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 825M

Amazon.com

Check prices at:

GeForce 830M

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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