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GeForce 8600 GT 1GB GDDR3 vs GeForce GT 320

Intro

The GeForce 8600 GT 1GB GDDR3 features a GPU clock speed of 540 MHz, and the 1024 MB of GDDR3 RAM is set to run at 700 MHz through a 128-bit bus. It also is comprised of 32 Stream Processors, 16 Texture Address Units, and 8 ROPs.

Compare those specs to the GeForce GT 320, which comes with GPU clock speed of 540 MHz, and 1024 MB of GDDR3 RAM set to run at 790 MHz through a 128-bit bus. It also features 72 Stream Processors, 24 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
GeForce 8600 GT 1GB GDDR3 47 Watts
Difference: 4 Watts (9%)

Memory Bandwidth

Performance-wise, the GeForce GT 320 should in theory be a small bit better than the GeForce 8600 GT 1GB GDDR3 overall. (explain)

GeForce GT 320 25280 MB/sec
GeForce 8600 GT 1GB GDDR3 22400 MB/sec
Difference: 2880 (13%)

Texel Rate

The GeForce GT 320 should be quite a bit (approximately 50%) faster with regards to AF than the GeForce 8600 GT 1GB GDDR3. (explain)

GeForce GT 320 12960 Mtexels/sec
GeForce 8600 GT 1GB GDDR3 8640 Mtexels/sec
Difference: 4320 (50%)

Pixel Rate

Both cards have exactly the same pixel rate, so in theory they should perform equally good at at AA, and be capable of handling the same resolutions. (explain)

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 1GB GDDR3

Amazon.com

Check prices at:

GeForce GT 320

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 1GB GDDR3 GeForce GT 320
Manufacturer nVidia nVidia
Year April 2007 February 2010
Code Name G84 GT215
Memory 1024 MB 1024 MB
Core Speed 540 MHz 540 MHz
Memory Speed 1400 MHz 1580 MHz
Power (Max TDP) 47 watts 43 watts
Bandwidth 22400 MB/sec 25280 MB/sec
Texel Rate 8640 Mtexels/sec 12960 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 4320 Mpixels/sec
Unified Shaders 32 72
Texture Mapping Units 16 24
Render Output Units 8 8
Bus Type GDDR3 GDDR3
Bus Width 128-bit 128-bit
Fab Process 80 nm 40 nm
Transistors 289 million 727 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of 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 fill rate also depends on lots of other factors, most notably 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 8600 GT 1GB GDDR3

Amazon.com

Check prices at:

GeForce GT 320

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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