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GeForce 820M vs GeForce GT 430

Intro

The GeForce 820M has clock speeds of 719 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 96 SPUs along with 16 TAUs and 4 ROPs.

Compare those specs to the GeForce GT 430, which features core speeds of 700 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. 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 820M 15 Watts
GeForce GT 430 60 Watts
Difference: 45 Watts (300%)

Memory Bandwidth

As far as performance goes, the GeForce GT 430 should theoretically be much better than the GeForce 820M in general. (explain)

GeForce GT 430 28800 MB/sec
GeForce 820M 16000 MB/sec
Difference: 12800 (80%)

Texel Rate

The GeForce 820M is a small bit (about 3%) more effective at texture filtering than the GeForce GT 430. (explain)

GeForce 820M 11504 Mtexels/sec
GeForce GT 430 11200 Mtexels/sec
Difference: 304 (3%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 820M is superior to the GeForce GT 430, though not by far. (explain)

GeForce 820M 2876 Mpixels/sec
GeForce GT 430 2800 Mpixels/sec
Difference: 76 (3%)

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 820M

Amazon.com

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GeForce GT 430

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 820M GeForce GT 430
Manufacturer nVidia nVidia
Year February 2014 October 2010
Code Name GF117 GF108
Memory 2048 MB 512 MB
Core Speed 719 MHz 700 MHz
Memory Speed 2000 MHz 1800 MHz
Power (Max TDP) 15 watts 60 watts
Bandwidth 16000 MB/sec 28800 MB/sec
Texel Rate 11504 Mtexels/sec 11200 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 2800 Mpixels/sec
Unified Shaders 96 96
Texture Mapping Units 16 16
Render Output Units 4 4
Bus Type DDR3 GDDR3
Bus Width 64-bit 128-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 585 million
Bus PCIe 2.0 x16 PCIe x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units by the core clock 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 processed per second.

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

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

GeForce GT 430

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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