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GeForce 820M vs GeForce 8800 GTS (G80) 320MB

Intro

The GeForce 820M comes with core clock speeds of 719 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 96 SPUs along with 16 Texture Address Units and 4 Rasterization Operator Units.

Compare those specs to the GeForce 8800 GTS (G80) 320MB, which has core clock speeds of 513 MHz on the GPU, and 792 MHz on the 320 MB of GDDR3 memory. It features 96 SPUs along with 48 TAUs and 20 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
GeForce 8800 GTS (G80) 320MB 143 Watts
Difference: 128 Watts (853%)

Memory Bandwidth

Performance-wise, the GeForce 8800 GTS (G80) 320MB should in theory be quite a bit better than the GeForce 820M overall. (explain)

GeForce 8800 GTS (G80) 320MB 63360 MB/sec
GeForce 820M 16000 MB/sec
Difference: 47360 (296%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB should be much (approximately 114%) faster with regards to texture filtering than the GeForce 820M. (explain)

GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 13120 (114%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 8800 GTS (G80) 320MB is a better choice, by far. (explain)

GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 7384 (257%)

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

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

GeForce 8800 GTS (G80) 320MB

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

Display Specifications

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Model GeForce 820M GeForce 8800 GTS (G80) 320MB
Manufacturer nVidia nVidia
Year February 2014 Feb 2007
Code Name GF117 G80
Memory 2048 MB 320 MB
Core Speed 719 MHz 513 MHz
Memory Speed 2000 MHz 1584 MHz
Power (Max TDP) 15 watts 143 watts
Bandwidth 16000 MB/sec 63360 MB/sec
Texel Rate 11504 Mtexels/sec 24624 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 10260 Mpixels/sec
Unified Shaders 96 96
Texture Mapping Units 16 48
Render Output Units 4 20
Bus Type DDR3 GDDR3
Bus Width 64-bit 320-bit
Fab Process 28 nm 90 nm
Transistors (Unknown) million 681 million
Bus PCIe 2.0 x16 PCIe x16
DirectX Version DirectX 12 DirectX 10
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce 820M

Amazon.com

Check prices at:

GeForce 8800 GTS (G80) 320MB

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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