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GeForce 830M vs GeForce 8400 GS 512MB

Intro

The GeForce 830M makes use of a 28 nm design. nVidia has clocked the core frequency at 1029 MHz. The DDR3 memory runs at a speed of 900 MHz on this model. It features 256 SPUs as well as 16 Texture Address Units and 8 ROPs.

Compare all that to the GeForce 8400 GS 512MB, which uses a 80 nm design. nVidia has clocked the core frequency at 650 MHz. The DDR2 memory runs at a frequency of 400 MHz on this specific card. It features 16 SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M 25 Watts
GeForce 8400 GS 512MB 40 Watts
Difference: 15 Watts (60%)

Memory Bandwidth

Theoretically speaking, the GeForce 830M is 125% quicker than the GeForce 8400 GS 512MB in general, because of its greater bandwidth. (explain)

GeForce 830M 14400 MB/sec
GeForce 8400 GS 512MB 6400 MB/sec
Difference: 8000 (125%)

Texel Rate

The GeForce 830M should be much (approximately 217%) more effective at texture filtering than the GeForce 8400 GS 512MB. (explain)

GeForce 830M 16464 Mtexels/sec
GeForce 8400 GS 512MB 5200 Mtexels/sec
Difference: 11264 (217%)

Pixel Rate

The GeForce 830M will be much (more or less 217%) faster with regards to full screen anti-aliasing than the GeForce 8400 GS 512MB, and also should be able to handle higher screen resolutions while still performing well. (explain)

GeForce 830M 8232 Mpixels/sec
GeForce 8400 GS 512MB 2600 Mpixels/sec
Difference: 5632 (217%)

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

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GeForce 8400 GS 512MB

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 830M GeForce 8400 GS 512MB
Manufacturer nVidia nVidia
Year March 12 2014 June 2007
Code Name GM108 G86
Memory 2048 MB 512 MB
Core Speed 1029 MHz 650 MHz
Memory Speed 1800 MHz 800 MHz
Power (Max TDP) 25 watts 40 watts
Bandwidth 14400 MB/sec 6400 MB/sec
Texel Rate 16464 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 256 16
Texture Mapping Units 16 8
Render Output Units 8 4
Bus Type DDR3 DDR2
Bus Width 64-bit 64-bit
Fab Process 28 nm 80 nm
Transistors (Unknown) million 210 million
Bus PCIe 3.0 x16 PCIe x16, PCI
DirectX Version DirectX 12 DirectX 10
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce 830M

Amazon.com

Check prices at:

GeForce 8400 GS 512MB

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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