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GeForce 8600 GT 256MB GDDR3 vs GeForce GT 440 3GB

Intro

The GeForce 8600 GT 256MB GDDR3 comes with a core clock frequency of 540 MHz and a GDDR3 memory frequency of 700 MHz. It also features a 128-bit memory bus, and makes use of a 80 nm design. It is made up of 32 SPUs, 16 TAUs, and 8 ROPs.

Compare those specifications to the GeForce GT 440 3GB, which uses a 40 nm design. nVidia has clocked the core speed at 594 MHz. The GDDR3 memory runs at a frequency of 900 MHz on this specific model. It features 144 SPUs along with 24 Texture Address Units and 24 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 256MB GDDR3 47 Watts
GeForce GT 440 3GB 56 Watts
Difference: 9 Watts (19%)

Memory Bandwidth

The GeForce GT 440 3GB should theoretically perform quite a bit faster than the GeForce 8600 GT 256MB GDDR3 in general. (explain)

GeForce GT 440 3GB 43200 MB/sec
GeForce 8600 GT 256MB GDDR3 22400 MB/sec
Difference: 20800 (93%)

Texel Rate

The GeForce GT 440 3GB is quite a bit (about 65%) better at AF than the GeForce 8600 GT 256MB GDDR3. (explain)

GeForce GT 440 3GB 14256 Mtexels/sec
GeForce 8600 GT 256MB GDDR3 8640 Mtexels/sec
Difference: 5616 (65%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GT 440 3GB is superior to the GeForce 8600 GT 256MB GDDR3, by a large margin. (explain)

GeForce GT 440 3GB 14256 Mpixels/sec
GeForce 8600 GT 256MB GDDR3 4320 Mpixels/sec
Difference: 9936 (230%)

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 256MB GDDR3

Amazon.com

Check prices at:

GeForce GT 440 3GB

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 256MB GDDR3 GeForce GT 440 3GB
Manufacturer nVidia nVidia
Year April 2007 October 2010
Code Name G84 GF106
Memory 256 MB 3072 MB
Core Speed 540 MHz 594 MHz
Memory Speed 1400 MHz 1800 MHz
Power (Max TDP) 47 watts 56 watts
Bandwidth 22400 MB/sec 43200 MB/sec
Texel Rate 8640 Mtexels/sec 14256 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 14256 Mpixels/sec
Unified Shaders 32 144
Texture Mapping Units 16 24
Render Output Units 8 24
Bus Type GDDR3 GDDR3
Bus Width 128-bit 192-bit
Fab Process 80 nm 40 nm
Transistors 289 million 1170 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied 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 higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 8600 GT 256MB GDDR3

Amazon.com

Check prices at:

GeForce GT 440 3GB

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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