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GeForce 820M vs GeForce 830M

Intro

The GeForce 820M makes use of a 28 nm design. nVidia has set the core frequency at 719 MHz. The DDR3 RAM runs at a frequency of 1000 MHz on this particular card. It features 96 SPUs as well as 16 Texture Address Units and 4 Rasterization Operator Units.

Compare those specifications to the GeForce 830M, which has a core clock frequency of 1029 MHz and a DDR3 memory speed of 900 MHz. It also uses a 64-bit memory bus, and uses a 28 nm design. It is made up of 256 SPUs, 16 Texture Address Units, and 8 ROPs.

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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

Theoretically speaking, the GeForce 820M should perform a little bit faster than the GeForce 830M overall. (explain)

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

Texel Rate

The GeForce 830M should be quite a bit (approximately 43%) more effective at anisotropic filtering than the GeForce 820M. (explain)

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

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 830M is the winner, and very much so. (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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a 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 number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability 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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