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GeForce 820M vs GeForce 8500 GT

Intro

The GeForce 820M has clock speeds of 719 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 96 SPUs as well as 16 TAUs and 4 ROPs.

Compare all that to the GeForce 8500 GT, which makes use of a 80 nm design. nVidia has clocked the core speed at 450 MHz. The DDR2 memory is set to run at a frequency of 400 MHz on this card. It features 16 SPUs as well as 8 Texture Address Units and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
GeForce 8500 GT 45 Watts
Difference: 30 Watts (200%)

Memory Bandwidth

In theory, the GeForce 820M should be 25% faster than the GeForce 8500 GT in general, due to its greater data rate. (explain)

GeForce 820M 16000 MB/sec
GeForce 8500 GT 12800 MB/sec
Difference: 3200 (25%)

Texel Rate

The GeForce 820M will be much (approximately 220%) better at texture filtering than the GeForce 8500 GT. (explain)

GeForce 820M 11504 Mtexels/sec
GeForce 8500 GT 3600 Mtexels/sec
Difference: 7904 (220%)

Pixel Rate

The GeForce 820M is much (more or less 60%) faster with regards to FSAA than the GeForce 8500 GT, and will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce 820M 2876 Mpixels/sec
GeForce 8500 GT 1800 Mpixels/sec
Difference: 1076 (60%)

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 8500 GT

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 8500 GT
Manufacturer nVidia nVidia
Year February 2014 April 2007
Code Name GF117 G86
Memory 2048 MB 512 MB
Core Speed 719 MHz 450 MHz
Memory Speed 2000 MHz 800 MHz
Power (Max TDP) 15 watts 45 watts
Bandwidth 16000 MB/sec 12800 MB/sec
Texel Rate 11504 Mtexels/sec 3600 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 1800 Mpixels/sec
Unified Shaders 96 16
Texture Mapping Units 16 8
Render Output Units 4 4
Bus Type DDR3 DDR2
Bus Width 64-bit 128-bit
Fab Process 28 nm 80 nm
Transistors (Unknown) million 210 million
Bus PCIe 2.0 x16 PCIe x16, PCI, PCIe x16 2.0
DirectX Version DirectX 12 DirectX 10
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially 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 8500 GT

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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