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GeForce 820M vs GeForce 830M

Intro

The GeForce 820M has a clock frequency of 719 MHz and a DDR3 memory speed of 1000 MHz. It also features a 64-bit memory bus, and makes use of a 28 nm design. It is made up of 96 SPUs, 16 TAUs, and 4 Raster Operation Units.

Compare all of that to the GeForce 830M, which has core clock speeds of 1029 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 256 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
GeForce 830M 25 Watts
Difference: 10 Watts (67%)

Memory Bandwidth

In theory, the GeForce 820M should perform a little bit faster than the GeForce 830M in general. (explain)

GeForce 820M 16000 MB/sec
GeForce 830M 14400 MB/sec
Difference: 1600 (11%)

Texel Rate

The GeForce 830M should be much (more or less 43%) faster with regards to texture filtering than the GeForce 820M. (explain)

GeForce 830M 16464 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 4960 (43%)

Pixel Rate

If using a high resolution is important to you, then the GeForce 830M is the winner, by a large margin. (explain)

GeForce 830M 8232 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 5356 (186%)

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

Check prices at:

GeForce 830M

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 820M GeForce 830M
Manufacturer nVidia nVidia
Year February 2014 March 12 2014
Code Name GF117 GM108
Memory 2048 MB 2048 MB
Core Speed 719 MHz 1029 MHz
Memory Speed 2000 MHz 1800 MHz
Power (Max TDP) 15 watts 25 watts
Bandwidth 16000 MB/sec 14400 MB/sec
Texel Rate 11504 Mtexels/sec 16464 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 8232 Mpixels/sec
Unified Shaders 96 256
Texture Mapping Units 16 16
Render Output Units 4 8
Bus Type DDR3 DDR3
Bus Width 64-bit 64-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics 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 that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units 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 fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

GeForce 830M

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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