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GeForce 825M vs GeForce 9400 GT 256MB

Intro

The GeForce 825M makes use of a 28 nm design. nVidia has clocked the core frequency at 850 MHz. The DDR3 memory runs at a frequency of 900 MHz on this card. It features 384 SPUs along with 16 Texture Address Units and 8 ROPs.

Compare all of that to the GeForce 9400 GT 256MB, which comes with a core clock speed of 550 MHz and a GDDR2 memory frequency of 400 MHz. It also features a 128-bit memory bus, and uses a 65 nm design. It is comprised of 16 SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M 33 Watts
GeForce 9400 GT 256MB 50 Watts
Difference: 17 Watts (52%)

Memory Bandwidth

As far as performance goes, the GeForce 825M should in theory be just a bit superior to the GeForce 9400 GT 256MB in general. (explain)

GeForce 825M 14400 MB/sec
GeForce 9400 GT 256MB 12800 MB/sec
Difference: 1600 (13%)

Texel Rate

The GeForce 825M is quite a bit (about 209%) better at texture filtering than the GeForce 9400 GT 256MB. (explain)

GeForce 825M 13600 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 9200 (209%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 825M is a better choice, and very much so. (explain)

GeForce 825M 6800 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 4600 (209%)

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 9400 GT 256MB

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 9400 GT 256MB
Manufacturer nVidia nVidia
Year January 27 2014 August 2008
Code Name GK208 G96a
Memory 2048 MB 256 MB
Core Speed 850 MHz 550 MHz
Memory Speed 1800 MHz 800 MHz
Power (Max TDP) 33 watts 50 watts
Bandwidth 14400 MB/sec 12800 MB/sec
Texel Rate 13600 Mtexels/sec 4400 Mtexels/sec
Pixel Rate 6800 Mpixels/sec 2200 Mpixels/sec
Unified Shaders 384 16
Texture Mapping Units 16 8
Render Output Units 8 4
Bus Type DDR3 GDDR2
Bus Width 64-bit 128-bit
Fab Process 28 nm 65 nm
Transistors (Unknown) million 314 million
Bus PCIe 3.0 x8 PCIe x16 2.0, PCI
DirectX Version DirectX 12 DirectX 10
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 are applied in one second. This figure is worked out by multiplying the total number of texture units of the card 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce 825M

Amazon.com

Check prices at:

GeForce 9400 GT 256MB

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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