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GeForce 8800 GTS (G92) vs GeForce 9800 GX2

Intro

The GeForce 8800 GTS (G92) features a core clock frequency of 650 MHz and a GDDR3 memory speed of 970 MHz. It also uses a 256-bit bus, and uses a 65 nm design. It is comprised of 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Compare those specs to the GeForce 9800 GX2, which uses a 65 nm design. nVidia has set the core frequency at 600 MHz. The GDDR3 memory works at a frequency of 1000 MHz on this specific model. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G92) 135 Watts
GeForce 9800 GX2 197 Watts
Difference: 62 Watts (46%)

Memory Bandwidth

In theory, the GeForce 9800 GX2 should be quite a bit faster than the GeForce 8800 GTS (G92) overall. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 8800 GTS (G92) 62080 MB/sec
Difference: 65920 (106%)

Texel Rate

The GeForce 9800 GX2 should be much (approximately 85%) more effective at anisotropic filtering than the GeForce 8800 GTS (G92). (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 8800 GTS (G92) 41600 Mtexels/sec
Difference: 35200 (85%)

Pixel Rate

The GeForce 9800 GX2 is a lot (more or less 85%) faster with regards to FSAA than the GeForce 8800 GTS (G92), and will be capable of handling higher resolutions better. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 8800 GTS (G92) 10400 Mpixels/sec
Difference: 8800 (85%)

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 (G92)

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.

Specifications

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Model GeForce 8800 GTS (G92) GeForce 9800 GX2
Manufacturer nVidia nVidia
Year Dec 2007 Mar 2008
Code Name G92 G92
Memory 512 MB 512 MB (x2)
Core Speed 650 MHz 600 MHz (x2)
Memory Speed 1940 MHz 2000 MHz (x2)
Power (Max TDP) 135 watts 197 watts
Bandwidth 62080 MB/sec 128000 MB/sec
Texel Rate 41600 Mtexels/sec 76800 Mtexels/sec
Pixel Rate 10400 Mpixels/sec 19200 Mpixels/sec
Unified Shaders 128 128 (x2)
Texture Mapping Units 64 64 (x2)
Render Output Units 16 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 256-bit 256-bit (x2)
Fab Process 65 nm 65 nm
Transistors 754 million 754 million
Bus PCIe x16 2.0 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 (measured in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce 8800 GTS (G92)

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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