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GeForce GT 420 vs GeForce GT 430 1GB

Intro

The GeForce GT 420 comes with a core clock frequency of 700 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It is comprised of 48 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Compare all of that to the GeForce GT 430 1GB, which uses a 40 nm design. nVidia has clocked the core speed at 700 MHz. The GDDR3 RAM runs at a speed of 900 MHz on this particular card. It features 96 SPUs along with 16 Texture Address Units and 4 ROPs.

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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 exactly the same memory bandwidth, so in theory they should perform exactly the same. (explain)

Texel Rate

The GeForce GT 430 1GB will be quite a bit (approximately 100%) better 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 theoretically they should be equally good at at AA, and be capable of handling the same 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 max amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory per 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 - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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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.

Comments

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

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