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GeForce GT 420 vs GeForce GT 430 1GB

Intro

The GeForce GT 420 uses a 40 nm design. nVidia has set the core speed at 700 MHz. The GDDR3 memory runs at a frequency of 900 MHz on this specific model. It features 48 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Compare those specs to the GeForce GT 430 1GB, which makes use of a 40 nm design. nVidia has set the core speed at 700 MHz. The GDDR3 RAM works at a speed of 900 MHz on this particular model. It features 96 SPUs as well as 16 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420 50 Watts
GeForce GT 430 1GB 60 Watts
Difference: 10 Watts (20%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so in theory they should have the same performance. (explain)

Texel Rate

The GeForce GT 430 1GB is a lot (approximately 100%) more effective at texture filtering than the GeForce GT 420. (explain)

GeForce GT 430 1GB 11200 Mtexels/sec
GeForce GT 420 5600 Mtexels/sec
Difference: 5600 (100%)

Pixel Rate

Both cards have exactly the same pixel rate, so in theory they should be equally good at at anti-aliasing, and be able to handle the same screen resolutions. (explain)

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 GT 420

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 GT 420 GeForce GT 430 1GB
Manufacturer nVidia nVidia
Year September 2010 October 2010
Code Name GF108 GF108
Memory 2048 MB 1024 MB
Core Speed 700 MHz 700 MHz
Memory Speed 1800 MHz 1800 MHz
Power (Max TDP) 50 watts 60 watts
Bandwidth 28800 MB/sec 28800 MB/sec
Texel Rate 5600 Mtexels/sec 11200 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 2800 Mpixels/sec
Unified Shaders 48 96
Texture Mapping Units 8 16
Render Output Units 4 4
Bus Type GDDR3 GDDR3
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 585 million 585 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GT 420

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.

Comments

One Response to “GeForce GT 420 vs GeForce GT 430 1GB”
Anonymous says:

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