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GeForce 825M vs GeForce 920M

Intro

The GeForce 825M comes with a GPU clock speed of 850 MHz, and the 2048 MB of DDR3 RAM is set to run at 900 MHz through a 64-bit bus. It also is made up of 384 Stream Processors, 16 TAUs, and 8 ROPs.

Compare those specs to the GeForce 920M, which uses a 28 nm design. nVidia has set the core frequency at 954 MHz. The DDR3 memory works at a speed of 900 MHz on this card. It features 384 SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

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

Texel Rate

The GeForce 920M is much (about 124%) faster with regards to texture filtering than the GeForce 825M. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 920M is a better choice, but not by far. (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

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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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the 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 most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max 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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