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GeForce 825M vs GeForce 920M

Intro

The GeForce 825M features a clock frequency of 850 MHz and a DDR3 memory frequency of 900 MHz. It also features a 64-bit bus, and uses a 28 nm design. It is made up of 384 SPUs, 16 TAUs, and 8 ROPs.

Compare those specifications to the GeForce 920M, which comes with a GPU core clock speed of 954 MHz, and 2048 MB of DDR3 memory running at 900 MHz through a 64-bit bus. It also is made up of 384 Stream Processors, 32 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have the exact same memory bandwidth, so in theory they should have identical performance. (explain)

Texel Rate

The GeForce 920M should be quite a bit (about 124%) more effective at anisotropic filtering than the GeForce 825M. (explain)

GeForce 920M 30528 Mtexels/sec
GeForce 825M 13600 Mtexels/sec
Difference: 16928 (124%)

Pixel Rate

The GeForce 920M should be a little bit (approximately 12%) faster with regards to AA than the GeForce 825M, and should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce 920M 7632 Mpixels/sec
GeForce 825M 6800 Mpixels/sec
Difference: 832 (12%)

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 920M

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 825M GeForce 920M
Manufacturer nVidia nVidia
Year January 27 2014 March 12 2015
Code Name GK208 GK208
Memory 2048 MB 2048 MB
Core Speed 850 MHz 954 MHz
Memory Speed 1800 MHz 1800 MHz
Power (Max TDP) 33 watts (Unknown) watts
Bandwidth 14400 MB/sec 14400 MB/sec
Texel Rate 13600 Mtexels/sec 30528 Mtexels/sec
Pixel Rate 6800 Mpixels/sec 7632 Mpixels/sec
Unified Shaders 384 384
Texture Mapping Units 16 32
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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. 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 fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 825M

Amazon.com

Check prices at:

GeForce 920M

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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