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GeForce 8800 GTS (G80) 640MB vs GeForce GTS 450

Intro

The GeForce 8800 GTS (G80) 640MB comes with core speeds of 513 MHz on the GPU, and 792 MHz on the 640 MB of GDDR3 memory. It features 96 SPUs along with 48 TAUs and 20 Rasterization Operator Units.

Compare all that to the GeForce GTS 450, which features GPU core speed of 783 MHz, and 512 MB of GDDR5 RAM set to run at 902 MHz through a 128-bit bus. It also features 192 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 37 Watts (35%)

Memory Bandwidth

Theoretically, the GeForce 8800 GTS (G80) 640MB should perform a little bit faster than the GeForce GTS 450 overall. (explain)

GeForce 8800 GTS (G80) 640MB 63360 MB/sec
GeForce GTS 450 57728 MB/sec
Difference: 5632 (10%)

Texel Rate

The GeForce GTS 450 is a small bit (approximately 2%) faster with regards to AF than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTS 450 25056 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 432 (2%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 450 is the winner, and very much so. (explain)

GeForce GTS 450 12528 Mpixels/sec
GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Difference: 2268 (22%)

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 GTS 450

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 GTS 450
Manufacturer nVidia nVidia
Year Nov 2006 (640) September 2010
Code Name G80 GF106
Memory 640 MB 512 MB
Core Speed 513 MHz 783 MHz
Memory Speed 1584 MHz 3608 MHz
Power (Max TDP) 143 watts 106 watts
Bandwidth 63360 MB/sec 57728 MB/sec
Texel Rate 24624 Mtexels/sec 25056 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 12528 Mpixels/sec
Unified Shaders 96 192
Texture Mapping Units 48 32
Render Output Units 20 16
Bus Type GDDR3 GDDR5
Bus Width 320-bit 128-bit
Fab Process 90 nm 40 nm
Transistors 681 million 1170 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics 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 number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

GeForce GTS 450

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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