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

Intro

The GeForce 820M features a GPU clock speed of 719 MHz, and the 2048 MB of DDR3 memory is set to run at 1000 MHz through a 64-bit bus. It also is made up of 96 SPUs, 16 Texture Address Units, and 4 ROPs.

Compare those specs to the GeForce 8800 GTS (G80) 320MB, which makes use of a 90 nm design. nVidia has clocked the core frequency at 513 MHz. The GDDR3 RAM is set to run at a frequency of 792 MHz on this card. It features 96 SPUs along with 48 TAUs and 20 ROPs.

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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 a lot better than the GeForce 820M in general. (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 will be quite a bit (approximately 114%) faster with regards to AF than the GeForce 820M. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the GeForce 8800 GTS (G80) 320MB is a better choice, and very much so. (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

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GeForce 820M

Amazon.com

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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

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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 largest amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 can be processed in one second. This is calculated by multiplying the total amount of texture units by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of 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 fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum 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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