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GeForce 830M vs GeForce 9400 GT 256MB

Intro

The GeForce 830M comes with a core clock frequency of 1029 MHz and a DDR3 memory frequency of 900 MHz. It also uses a 64-bit bus, and makes use of a 28 nm design. It features 256 SPUs, 16 TAUs, and 8 ROPs.

Compare those specs to the GeForce 9400 GT 256MB, which comes with a clock speed of 550 MHz and a GDDR2 memory frequency of 400 MHz. It also uses a 128-bit bus, and uses a 65 nm design. It is comprised of 16 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M 25 Watts
GeForce 9400 GT 256MB 50 Watts
Difference: 25 Watts (100%)

Memory Bandwidth

The GeForce 830M should theoretically be a bit faster than the GeForce 9400 GT 256MB overall. (explain)

GeForce 830M 14400 MB/sec
GeForce 9400 GT 256MB 12800 MB/sec
Difference: 1600 (13%)

Texel Rate

The GeForce 830M will be much (more or less 274%) faster with regards to texture filtering than the GeForce 9400 GT 256MB. (explain)

GeForce 830M 16464 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 12064 (274%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 830M is the winner, by far. (explain)

GeForce 830M 8232 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 6032 (274%)

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 830M

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 830M GeForce 9400 GT 256MB
Manufacturer nVidia nVidia
Year March 12 2014 August 2008
Code Name GM108 G96a
Memory 2048 MB 256 MB
Core Speed 1029 MHz 550 MHz
Memory Speed 1800 MHz 800 MHz
Power (Max TDP) 25 watts 50 watts
Bandwidth 14400 MB/sec 12800 MB/sec
Texel Rate 16464 Mtexels/sec 4400 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 2200 Mpixels/sec
Unified Shaders 256 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 x16 PCIe x16 2.0, PCI
DirectX Version DirectX 12 DirectX 10
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce 830M

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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