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GeForce 8800 GTS (G80) 640MB vs GeForce 9800 GT 1GB

Intro

The GeForce 8800 GTS (G80) 640MB comes with a core clock frequency of 513 MHz and a GDDR3 memory frequency of 792 MHz. It also features a 320-bit memory bus, and uses a 90 nm design. It is comprised of 96 SPUs, 48 TAUs, and 20 ROPs.

Compare those specs to the GeForce 9800 GT 1GB, which has GPU clock speed of 600 MHz, and 1024 MB of GDDR3 RAM set to run at 900 MHz through a 256-bit bus. It also features 112 Stream Processors, 56 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 1GB 105 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 38 Watts (36%)

Memory Bandwidth

Performance-wise, the GeForce 8800 GTS (G80) 640MB should in theory be just a bit better than the GeForce 9800 GT 1GB overall. (explain)

GeForce 8800 GTS (G80) 640MB 63360 MB/sec
GeForce 9800 GT 1GB 57600 MB/sec
Difference: 5760 (10%)

Texel Rate

The GeForce 9800 GT 1GB is a lot (about 36%) more effective at anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce 9800 GT 1GB 33600 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 8976 (36%)

Pixel Rate

The GeForce 8800 GTS (G80) 640MB should be a bit (about 7%) more effective at full screen anti-aliasing than the GeForce 9800 GT 1GB, and should be capable of handling higher resolutions better. (explain)

GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
GeForce 9800 GT 1GB 9600 Mpixels/sec
Difference: 660 (7%)

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 GTS (G80) 640MB

Amazon.com

Check prices at:

GeForce 9800 GT 1GB

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 8800 GTS (G80) 640MB GeForce 9800 GT 1GB
Manufacturer nVidia nVidia
Year Nov 2006 (640) July 2008
Code Name G80 G92a/b
Memory 640 MB 1024 MB
Core Speed 513 MHz 600 MHz
Memory Speed 1584 MHz 1800 MHz
Power (Max TDP) 143 watts 105 watts
Bandwidth 63360 MB/sec 57600 MB/sec
Texel Rate 24624 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 96 112
Texture Mapping Units 48 56
Render Output Units 20 16
Bus Type GDDR3 GDDR3
Bus Width 320-bit 256-bit
Fab Process 90 nm 65/55 nm
Transistors 681 million 754 million
Bus PCIe x16 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

GeForce 9800 GT 1GB

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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