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GeForce 8800 GT 512MB vs GeForce 8800 GTS (G80) 640MB

Intro

The GeForce 8800 GT 512MB makes use of a 65 nm design. nVidia has set the core frequency at 600 MHz. The GDDR3 RAM is set to run at a speed of 900 MHz on this specific card. It features 112 SPUs along with 56 TAUs and 16 ROPs.

Compare all of that to the GeForce 8800 GTS (G80) 640MB, which has a GPU core clock speed of 513 MHz, and 640 MB of GDDR3 memory running at 792 MHz through a 320-bit bus. It also is comprised of 96 Stream Processors, 48 TAUs, and 20 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB 105 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 38 Watts (36%)

Memory Bandwidth

In theory, the GeForce 8800 GTS (G80) 640MB should perform a small bit faster than the GeForce 8800 GT 512MB overall. (explain)

GeForce 8800 GTS (G80) 640MB 63360 MB/sec
GeForce 8800 GT 512MB 57600 MB/sec
Difference: 5760 (10%)

Texel Rate

The GeForce 8800 GT 512MB is a lot (about 36%) faster with regards to texture filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce 8800 GT 512MB 33600 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 8976 (36%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 8800 GTS (G80) 640MB is superior to the GeForce 8800 GT 512MB, not by a very large margin though. (explain)

GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
GeForce 8800 GT 512MB 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 GT 512MB

Amazon.com

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GeForce 8800 GTS (G80) 640MB

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 GT 512MB GeForce 8800 GTS (G80) 640MB
Manufacturer nVidia nVidia
Year Oct 2007 Nov 2006 (640)
Code Name G92 G80
Memory 512 MB 640 MB
Core Speed 600 MHz 513 MHz
Memory Speed 1800 MHz 1584 MHz
Power (Max TDP) 105 watts 143 watts
Bandwidth 57600 MB/sec 63360 MB/sec
Texel Rate 33600 Mtexels/sec 24624 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 10260 Mpixels/sec
Unified Shaders 112 96
Texture Mapping Units 56 48
Render Output Units 16 20
Bus Type GDDR3 GDDR3
Bus Width 256-bit 320-bit
Fab Process 65 nm 90 nm
Transistors 754 million 681 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: 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 worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Display Prices

Hide Prices

GeForce 8800 GT 512MB

Amazon.com

Check prices at:

GeForce 8800 GTS (G80) 640MB

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.

Comments

One Response to “GeForce 8800 GT 512MB vs GeForce 8800 GTS (G80) 640MB”
Bisk8 says:

Exelente trabalho, parabéns!

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