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GeForce 820M vs GeForce 8500 GT

Intro

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

Compare those specifications to the GeForce 8500 GT, which makes use of a 80 nm design. nVidia has set the core frequency at 450 MHz. The DDR2 memory runs at a speed of 400 MHz on this particular 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

Performance-wise, the GeForce 820M should theoretically be a lot better than the GeForce 8500 GT in general. (explain)

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

Texel Rate

The GeForce 820M is a lot (about 220%) faster with regards to anisotropic 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 should be quite a bit (about 60%) better at anti-aliasing than the GeForce 8500 GT, and able to handle higher resolutions without slowing down too much. (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

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.

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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. 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 texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - 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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