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GeForce 8600 GT 512MB DDR2 vs GeForce 8800 GT 256MB

Intro

The GeForce 8600 GT 512MB DDR2 makes use of a 80 nm design. nVidia has clocked the core frequency at 540 MHz. The DDR2 RAM is set to run at a speed of 400 MHz on this particular card. It features 32 SPUs along with 16 TAUs and 8 ROPs.

Compare that to the GeForce 8800 GT 256MB, which features GPU core speed of 600 MHz, and 256 MB of GDDR3 memory set to run at 700 MHz through a 256-bit bus. It also is comprised of 112 Stream Processors, 56 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB DDR2 47 Watts
GeForce 8800 GT 256MB 105 Watts
Difference: 58 Watts (123%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GT 256MB should be quite a bit faster than the GeForce 8600 GT 512MB DDR2 in general. (explain)

GeForce 8800 GT 256MB 44800 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 32000 (250%)

Texel Rate

The GeForce 8800 GT 256MB should be a lot (more or less 289%) faster with regards to texture filtering than the GeForce 8600 GT 512MB DDR2. (explain)

GeForce 8800 GT 256MB 33600 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 24960 (289%)

Pixel Rate

The GeForce 8800 GT 256MB will be quite a bit (about 122%) faster with regards to full screen anti-aliasing than the GeForce 8600 GT 512MB DDR2, and also should be capable of handling higher resolutions better. (explain)

GeForce 8800 GT 256MB 9600 Mpixels/sec
GeForce 8600 GT 512MB DDR2 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 DDR2

Amazon.com

Check prices at:

GeForce 8800 GT 256MB

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 GT 512MB DDR2 GeForce 8800 GT 256MB
Manufacturer nVidia nVidia
Year April 2007 Dec 2007
Code Name G84 G92
Memory 512 MB 256 MB
Core Speed 540 MHz 600 MHz
Memory Speed 800 MHz 1400 MHz
Power (Max TDP) 47 watts 105 watts
Bandwidth 12800 MB/sec 44800 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 DDR2 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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 8600 GT 512MB DDR2

Amazon.com

Check prices at:

GeForce 8800 GT 256MB

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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