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GeForce 8600 GTS vs GeForce 9800 GX2

Intro

The GeForce 8600 GTS makes use of a 80 nm design. nVidia has clocked the core speed at 675 MHz. The GDDR3 memory works at a frequency of 1000 MHz on this card. It features 32 SPUs as well as 16 TAUs and 8 ROPs.

Compare that to the GeForce 9800 GX2, which has a core clock speed of 600 MHz and a GDDR3 memory frequency of 1000 MHz. It also uses a 256-bit bus, and makes use of a 65 nm design. It features 128 SPUs, 64 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GTS 75 Watts
GeForce 9800 GX2 197 Watts
Difference: 122 Watts (163%)

Memory Bandwidth

The GeForce 9800 GX2 should theoretically be a lot faster than the GeForce 8600 GTS overall. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 8600 GTS 32000 MB/sec
Difference: 96000 (300%)

Texel Rate

The GeForce 9800 GX2 should be a lot (more or less 611%) faster with regards to AF than the GeForce 8600 GTS. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 8600 GTS 10800 Mtexels/sec
Difference: 66000 (611%)

Pixel Rate

The GeForce 9800 GX2 will be much (about 256%) more effective at FSAA than the GeForce 8600 GTS, and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 8600 GTS 5400 Mpixels/sec
Difference: 13800 (256%)

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 8600 GTS

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 8600 GTS GeForce 9800 GX2
Manufacturer nVidia nVidia
Year April 2007 Mar 2008
Code Name G84 G92
Memory 512 MB 512 MB (x2)
Core Speed 675 MHz 600 MHz (x2)
Memory Speed 2000 MHz 2000 MHz (x2)
Power (Max TDP) 75 watts 197 watts
Bandwidth 32000 MB/sec 128000 MB/sec
Texel Rate 10800 Mtexels/sec 76800 Mtexels/sec
Pixel Rate 5400 Mpixels/sec 19200 Mpixels/sec
Unified Shaders 32 128 (x2)
Texture Mapping Units 16 64 (x2)
Render Output Units 8 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 128-bit 256-bit (x2)
Fab Process 80 nm 65 nm
Transistors 289 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 transported across the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GTS

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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