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GeForce 8500 GT vs GeForce 8600 GT 1GB DDR2

Intro

The GeForce 8500 GT features core clock speeds of 450 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 memory. It features 16 SPUs along with 8 TAUs and 4 ROPs.

Compare those specs to the GeForce 8600 GT 1GB DDR2, which has core speeds of 540 MHz on the GPU, and 400 MHz on the 1024 MB of DDR2 RAM. It features 32 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT 45 Watts
GeForce 8600 GT 1GB DDR2 47 Watts
Difference: 2 Watts (4%)

Memory Bandwidth

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

Texel Rate

The GeForce 8600 GT 1GB DDR2 should be much (approximately 140%) more effective at AF than the GeForce 8500 GT. (explain)

GeForce 8600 GT 1GB DDR2 8640 Mtexels/sec
GeForce 8500 GT 3600 Mtexels/sec
Difference: 5040 (140%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 8600 GT 1GB DDR2 is the winner, by far. (explain)

GeForce 8600 GT 1GB DDR2 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 GT 1GB DDR2

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 GT 1GB DDR2
Manufacturer nVidia nVidia
Year April 2007 April 2007
Code Name G86 G84
Memory 512 MB 1024 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 max amount of information (in units of MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at 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 the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 8500 GT

Amazon.com

Check prices at:

GeForce 8600 GT 1GB DDR2

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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