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GeForce 8500 GT vs GeForce 8600 GS (OEM)

Intro

The GeForce 8500 GT uses a 80 nm design. nVidia has set the core frequency at 450 MHz. The DDR2 RAM runs at a frequency of 400 MHz on this particular card. It features 16 SPUs along with 8 TAUs and 4 ROPs.

Compare all that to the GeForce 8600 GS (OEM), which features GPU clock speed of 540 MHz, and 256 MB of DDR2 memory running at 400 MHz through a 128-bit bus. It also is made up of 32 Stream Processors, 16 TAUs, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT 45 Watts
GeForce 8600 GS (OEM) 47 Watts
Difference: 2 Watts (4%)

Memory Bandwidth

Both cards have exactly the same bandwidth, so in theory they should have the same performance. (explain)

Texel Rate

The GeForce 8600 GS (OEM) should be much (approximately 140%) better at texture filtering than the GeForce 8500 GT. (explain)

GeForce 8600 GS (OEM) 8640 Mtexels/sec
GeForce 8500 GT 3600 Mtexels/sec
Difference: 5040 (140%)

Pixel Rate

The GeForce 8600 GS (OEM) is a lot (more or less 140%) better at anti-aliasing than the GeForce 8500 GT, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce 8600 GS (OEM) 4320 Mpixels/sec
GeForce 8500 GT 1800 Mpixels/sec
Difference: 2520 (140%)

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 8500 GT

Amazon.com

Check prices at:

GeForce 8600 GS (OEM)

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 8500 GT GeForce 8600 GS (OEM)
Manufacturer nVidia nVidia
Year April 2007 April 2007
Code Name G86 G84
Memory 512 MB 256 MB
Core Speed 450 MHz 540 MHz
Memory Speed 800 MHz 800 MHz
Power (Max TDP) 45 watts 47 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 3600 Mtexels/sec 8640 Mtexels/sec
Pixel Rate 1800 Mpixels/sec 4320 Mpixels/sec
Unified Shaders 16 32
Texture Mapping Units 8 16
Render Output Units 4 8
Bus Type DDR2 DDR2
Bus Width 128-bit 128-bit
Fab Process 80 nm 80 nm
Transistors 210 million 289 million
Bus PCIe x16, PCI, 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 data (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 8500 GT

Amazon.com

Check prices at:

GeForce 8600 GS (OEM)

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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