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GeForce 9400 GT 256MB vs GeForce GT 430 1GB

Intro

The GeForce 9400 GT 256MB comes with a GPU clock speed of 550 MHz, and the 256 MB of GDDR2 memory runs at 400 MHz through a 128-bit bus. It also features 16 Stream Processors, 8 Texture Address Units, and 4 ROPs.

Compare those specifications to the GeForce GT 430 1GB, which comes with GPU core speed of 700 MHz, and 1024 MB of GDDR3 memory set to run at 900 MHz through a 128-bit bus. It also features 96 Stream Processors, 16 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB 50 Watts
GeForce GT 430 1GB 60 Watts
Difference: 10 Watts (20%)

Memory Bandwidth

Theoretically, the GeForce GT 430 1GB should perform much faster than the GeForce 9400 GT 256MB in general. (explain)

GeForce GT 430 1GB 28800 MB/sec
GeForce 9400 GT 256MB 12800 MB/sec
Difference: 16000 (125%)

Texel Rate

The GeForce GT 430 1GB is quite a bit (approximately 155%) more effective at texture filtering than the GeForce 9400 GT 256MB. (explain)

GeForce GT 430 1GB 11200 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 6800 (155%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GT 430 1GB is a better choice, and very much so. (explain)

GeForce GT 430 1GB 2800 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 600 (27%)

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 9400 GT 256MB

Amazon.com

Check prices at:

GeForce GT 430 1GB

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 9400 GT 256MB GeForce GT 430 1GB
Manufacturer nVidia nVidia
Year August 2008 October 2010
Code Name G96a GF108
Memory 256 MB 1024 MB
Core Speed 550 MHz 700 MHz
Memory Speed 800 MHz 1800 MHz
Power (Max TDP) 50 watts 60 watts
Bandwidth 12800 MB/sec 28800 MB/sec
Texel Rate 4400 Mtexels/sec 11200 Mtexels/sec
Pixel Rate 2200 Mpixels/sec 2800 Mpixels/sec
Unified Shaders 16 96
Texture Mapping Units 8 16
Render Output Units 4 4
Bus Type GDDR2 GDDR3
Bus Width 128-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 314 million 585 million
Bus PCIe x16 2.0, PCI PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of data (in units of MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the 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 number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 9400 GT 256MB

Amazon.com

Check prices at:

GeForce GT 430 1GB

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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