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

Intro

The GeForce 8800 GTS (G80) 640MB features a GPU core clock speed of 513 MHz, and the 640 MB of GDDR3 RAM is set to run at 792 MHz through a 320-bit bus. It also features 96 Stream Processors, 48 Texture Address Units, and 20 ROPs.

Compare that to the GeForce GTS 450, which features a clock frequency of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It is comprised of 192 SPUs, 32 TAUs, and 16 Raster Operation Units.

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

As far as performance goes, the GeForce 8800 GTS (G80) 640MB should in theory be a bit better than the GeForce GTS 450 in general. (explain)

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

Texel Rate

The GeForce GTS 450 will be a little bit (about 2%) faster with regards to anisotropic filtering 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 using high levels of AA is important to you, then the GeForce GTS 450 is a better choice, 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 largest amount of information (counted in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - 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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