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GeForce 8800 GTX vs Geforce GTX 680

Intro

The GeForce 8800 GTX has a core clock frequency of 575 MHz and a GDDR3 memory speed of 900 MHz. It also features a 384-bit memory bus, and makes use of a 90 nm design. It features 128 SPUs, 64 Texture Address Units, and 24 Raster Operation Units.

Compare those specifications to the Geforce GTX 680, which features a GPU core clock speed of 1006 MHz, and 2048 MB of GDDR5 RAM running at 1502 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

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 theoretically perform much faster than the GeForce 8800 GTX in general. (explain)

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

Texel Rate

The Geforce GTX 680 should be much (approximately 250%) faster with regards to texture filtering than the GeForce 8800 GTX. (explain)

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

Pixel Rate

The Geforce GTX 680 will be a lot (approximately 133%) faster with regards to FSAA than the GeForce 8800 GTX, and also will be capable of handling higher resolutions more effectively. (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 max amount of data (measured in megabytes per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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 potential to get to the max fill rate.

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