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GeForce 8800 GTS (G80) 320MB vs GeForce 9800 GX2

Intro

The GeForce 8800 GTS (G80) 320MB has core speeds of 513 MHz on the GPU, and 792 MHz on the 320 MB of GDDR3 memory. It features 96 SPUs as well as 48 TAUs and 20 ROPs.

Compare those specifications to the GeForce 9800 GX2, which makes use of a 65 nm design. nVidia has set the core frequency at 600 MHz. The GDDR3 RAM runs at a frequency of 1000 MHz on this card. It features 128 SPUs along with 64 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB 143 Watts
GeForce 9800 GX2 197 Watts
Difference: 54 Watts (38%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GX2 should in theory be much superior to the GeForce 8800 GTS (G80) 320MB overall. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Difference: 64640 (102%)

Texel Rate

The GeForce 9800 GX2 should be much (more or less 212%) better at AF than the GeForce 8800 GTS (G80) 320MB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Difference: 52176 (212%)

Pixel Rate

The GeForce 9800 GX2 will be much (more or less 87%) more effective at FSAA than the GeForce 8800 GTS (G80) 320MB, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
Difference: 8940 (87%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce 8800 GTS (G80) 320MB

Amazon.com

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GeForce 9800 GX2

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) 320MB GeForce 9800 GX2
Manufacturer nVidia nVidia
Year Feb 2007 Mar 2008
Code Name G80 G92
Memory 320 MB 512 MB (x2)
Core Speed 513 MHz 600 MHz (x2)
Memory Speed 1584 MHz 2000 MHz (x2)
Power (Max TDP) 143 watts 197 watts
Bandwidth 63360 MB/sec 128000 MB/sec
Texel Rate 24624 Mtexels/sec 76800 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 19200 Mpixels/sec
Unified Shaders 96 128 (x2)
Texture Mapping Units 48 64 (x2)
Render Output Units 20 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 320-bit 256-bit (x2)
Fab Process 90 nm 65 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 largest amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must 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 AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per 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 ability to reach the max fill rate.

Display Prices

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GeForce 8800 GTS (G80) 320MB

Amazon.com

Check prices at:

GeForce 9800 GX2

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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