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GeForce 820M vs GeForce 9500 GT DDR2

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 along with 16 TAUs and 4 Rasterization Operator Units.

Compare all that to the GeForce 9500 GT DDR2, which features a core clock frequency of 550 MHz and a DDR2 memory speed of 500 MHz. It also uses a 128-bit memory bus, and uses a 65 nm design. It is made up of 32 SPUs, 16 TAUs, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
GeForce 9500 GT DDR2 50 Watts
Difference: 35 Watts (233%)

Memory Bandwidth

Both cards have the exact same bandwidth, so theoretically they should perform exactly the same. (explain)

Texel Rate

The GeForce 820M is quite a bit (about 31%) faster with regards to anisotropic filtering than the GeForce 9500 GT DDR2. (explain)

GeForce 820M 11504 Mtexels/sec
GeForce 9500 GT DDR2 8800 Mtexels/sec
Difference: 2704 (31%)

Pixel Rate

The GeForce 9500 GT DDR2 will be quite a bit (about 53%) more effective at full screen anti-aliasing than the GeForce 820M, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce 9500 GT DDR2 4400 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 1524 (53%)

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 9500 GT DDR2

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 9500 GT DDR2
Manufacturer nVidia nVidia
Year February 2014 July 2008
Code Name GF117 G96a
Memory 2048 MB 256 MB
Core Speed 719 MHz 550 MHz
Memory Speed 2000 MHz 1000 MHz
Power (Max TDP) 15 watts 50 watts
Bandwidth 16000 MB/sec 16000 MB/sec
Texel Rate 11504 Mtexels/sec 8800 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 96 32
Texture Mapping Units 16 16
Render Output Units 4 8
Bus Type DDR3 DDR2
Bus Width 64-bit 128-bit
Fab Process 28 nm 65 nm
Transistors (Unknown) million 314 million
Bus PCIe 2.0 x16 PCIe x16 2.0, PCI
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 MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core 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 rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

GeForce 9500 GT DDR2

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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