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GeForce 820M vs GeForce GTX 950

Intro

The GeForce 820M uses a 28 nm design. nVidia has set the core speed at 719 MHz. The DDR3 RAM is set to run at a speed of 1000 MHz on this card. It features 96 SPUs as well as 16 Texture Address Units and 4 Rasterization Operator Units.

Compare those specs to the GeForce GTX 950, which comes with a clock frequency of 1024 MHz and a GDDR5 memory frequency of 1652 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is comprised of 768 SPUs, 48 Texture Address Units, and 32 ROPs.

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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 950 6536 points
GeForce 820M 850 points
Difference: 5686 (669%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
GeForce GTX 950 90 Watts
Difference: 75 Watts (500%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 950 should be 561% faster than the GeForce 820M in general, because of its greater data rate. (explain)

GeForce GTX 950 105728 MB/sec
GeForce 820M 16000 MB/sec
Difference: 89728 (561%)

Texel Rate

The GeForce GTX 950 should be quite a bit (approximately 327%) better at texture filtering than the GeForce 820M. (explain)

GeForce GTX 950 49152 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 37648 (327%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 950 is superior to the GeForce 820M, by far. (explain)

GeForce GTX 950 32768 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 29892 (1039%)

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 950

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 950
Manufacturer nVidia nVidia
Year February 2014 August 2015
Code Name GF117 GM206
Memory 2048 MB 2048 MB
Core Speed 719 MHz 1024 MHz
Memory Speed 2000 MHz 6608 MHz
Power (Max TDP) 15 watts 90 watts
Bandwidth 16000 MB/sec 105728 MB/sec
Texel Rate 11504 Mtexels/sec 49152 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 32768 Mpixels/sec
Unified Shaders 96 768
Texture Mapping Units 16 48
Render Output Units 4 32
Bus Type DDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 2940 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units of the card by the core clock 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

GeForce GTX 950

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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