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GeForce 8600 GT 512MB GDDR3 vs GeForce 8800 GT 1GB

Intro

The GeForce 8600 GT 512MB GDDR3 has core clock speeds of 540 MHz on the GPU, and 700 MHz on the 512 MB of GDDR3 memory. It features 32 SPUs along with 16 Texture Address Units and 8 ROPs.

Compare all that to the GeForce 8800 GT 1GB, which has a core clock speed of 600 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 256-bit bus, and uses a 65 nm design. It features 112 SPUs, 56 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB GDDR3 47 Watts
GeForce 8800 GT 1GB 105 Watts
Difference: 58 Watts (123%)

Memory Bandwidth

As far as performance goes, the GeForce 8800 GT 1GB should in theory be much better than the GeForce 8600 GT 512MB GDDR3 overall. (explain)

GeForce 8800 GT 1GB 57600 MB/sec
GeForce 8600 GT 512MB GDDR3 22400 MB/sec
Difference: 35200 (157%)

Texel Rate

The GeForce 8800 GT 1GB will be much (about 289%) faster with regards to texture filtering than the GeForce 8600 GT 512MB GDDR3. (explain)

GeForce 8800 GT 1GB 33600 Mtexels/sec
GeForce 8600 GT 512MB GDDR3 8640 Mtexels/sec
Difference: 24960 (289%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 8800 GT 1GB is superior to the GeForce 8600 GT 512MB GDDR3, and very much so. (explain)

GeForce 8800 GT 1GB 9600 Mpixels/sec
GeForce 8600 GT 512MB GDDR3 4320 Mpixels/sec
Difference: 5280 (122%)

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 8600 GT 512MB GDDR3

Amazon.com

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GeForce 8800 GT 1GB

Amazon.com

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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 GT 512MB GDDR3 GeForce 8800 GT 1GB
Manufacturer nVidia nVidia
Year April 2007 Dec 2007
Code Name G84 G92
Memory 512 MB 1024 MB
Core Speed 540 MHz 600 MHz
Memory Speed 1400 MHz 1800 MHz
Power (Max TDP) 47 watts 105 watts
Bandwidth 22400 MB/sec 57600 MB/sec
Texel Rate 8640 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 32 112
Texture Mapping Units 16 56
Render Output Units 8 16
Bus Type GDDR3 GDDR3
Bus Width 128-bit 256-bit
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 max amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce 8600 GT 512MB GDDR3

Amazon.com

Check prices at:

GeForce 8800 GT 1GB

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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