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GeForce 820M vs GeForce GTX 980M

Intro

The GeForce 820M features a core clock frequency of 719 MHz and a DDR3 memory frequency of 1000 MHz. It also uses a 64-bit memory bus, and uses 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 GTX 980M, which features GPU clock speed of 1038 MHz, and 4096 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 TAUs, and 64 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 980M 9476 points
GeForce 820M 850 points
Difference: 8626 (1015%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
GeForce GTX 980M 100 Watts
Difference: 85 Watts (567%)

Memory Bandwidth

In theory, the GeForce GTX 980M should be a lot faster than the GeForce 820M overall. (explain)

GeForce GTX 980M 128000 MB/sec
GeForce 820M 16000 MB/sec
Difference: 112000 (700%)

Texel Rate

The GeForce GTX 980M is a lot (more or less 766%) faster with regards to anisotropic filtering than the GeForce 820M. (explain)

GeForce GTX 980M 99648 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 88144 (766%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 980M is superior to the GeForce 820M, and very much so. (explain)

GeForce GTX 980M 66432 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 63556 (2210%)

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 GTX 980M

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 GTX 980M
Manufacturer nVidia nVidia
Year February 2014 October 7 2014
Code Name GF117 GM204
Memory 2048 MB 4096 MB
Core Speed 719 MHz 1038 MHz
Memory Speed 2000 MHz 4000 MHz
Power (Max TDP) 15 watts 100 watts
Bandwidth 16000 MB/sec 128000 MB/sec
Texel Rate 11504 Mtexels/sec 99648 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 66432 Mpixels/sec
Unified Shaders 96 1536
Texture Mapping Units 16 96
Render Output Units 4 64
Bus Type DDR3 GDDR5
Bus Width 64-bit 256-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 max amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs 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 is also dependant on lots of other factors, most notably the memory bandwidth of the card - 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 GTX 980M

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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