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GeForce 8800 GTX vs Geforce GTX 680


Intro

The GeForce 8800 GTX makes use of a 90 nm design. nVidia has clocked the core speed at 575 MHz. The GDDR3 RAM runs at a frequency of 900 MHz on this card. It features 128 SPUs along with 64 TAUs and 24 Rasterization Operator Units.

Compare that to the Geforce GTX 680, which features clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTX 155 Watts
Geforce GTX 680 195 Watts
Difference: 40 Watts (26%)

Memory Bandwidth

The Geforce GTX 680 should in theory be much faster than the GeForce 8800 GTX overall. (explain)

Geforce GTX 680 192256 MB/sec
GeForce 8800 GTX 86400 MB/sec
Difference: 105856 (123%)

Texel Rate

The Geforce GTX 680 will be a lot (more or less 250%) more effective at anisotropic filtering than the GeForce 8800 GTX. (explain)

Geforce GTX 680 128768 Mtexels/sec
GeForce 8800 GTX 36800 Mtexels/sec
Difference: 91968 (250%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 680 is superior to the GeForce 8800 GTX, by far. (explain)

Geforce GTX 680 32192 Mpixels/sec
GeForce 8800 GTX 13800 Mpixels/sec
Difference: 18392 (133%)

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 8800 GTX

Amazon.com

Geforce GTX 680

Amazon.com

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 8800 GTX Geforce GTX 680
Manufacturer nVidia nVidia
Year Nov 2006 March 2012
Code Name G80 GK104
Memory 768 MB 2048 MB
Core Speed 575 MHz 1006 MHz
Memory Speed 1800 MHz 6008 MHz
Power (Max TDP) 155 watts 195 watts
Bandwidth 86400 MB/sec 192256 MB/sec
Texel Rate 36800 Mtexels/sec 128768 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 32192 Mpixels/sec
Unified Shaders 128 1536
Texture Mapping Units 64 128
Render Output Units 24 32
Bus Type GDDR3 GDDR5
Bus Width 384-bit 256-bit
Fab Process 90 nm 28 nm
Transistors 681 million 3540 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce 8800 GTX

Amazon.com

Geforce GTX 680

Amazon.com

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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