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GeForce GT 320 vs Geforce GTX 680

Intro

The GeForce GT 320 comes with a core clock speed of 540 MHz and a GDDR3 memory frequency of 790 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It is comprised of 72 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Compare those specifications to the Geforce GTX 680, which comes with a core clock frequency of 1006 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1536 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
Geforce GTX 680 195 Watts
Difference: 152 Watts (353%)

Memory Bandwidth

The Geforce GTX 680, in theory, should perform much faster than the GeForce GT 320 in general. (explain)

Geforce GTX 680 192256 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 166976 (661%)

Texel Rate

The Geforce GTX 680 is a lot (more or less 894%) more effective at texture filtering than the GeForce GT 320. (explain)

Geforce GTX 680 128768 Mtexels/sec
GeForce GT 320 12960 Mtexels/sec
Difference: 115808 (894%)

Pixel Rate

The Geforce GTX 680 is a lot (approximately 645%) more effective at full screen anti-aliasing than the GeForce GT 320, and also able to handle higher screen resolutions without slowing down too much. (explain)

Geforce GTX 680 32192 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 27872 (645%)

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 GT 320

Amazon.com

Check prices at:

Geforce GTX 680

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 GT 320 Geforce GTX 680
Manufacturer nVidia nVidia
Year February 2010 March 2012
Code Name GT215 GK104
Memory 1024 MB 2048 MB
Core Speed 540 MHz 1006 MHz
Memory Speed 1580 MHz 6008 MHz
Power (Max TDP) 43 watts 195 watts
Bandwidth 25280 MB/sec 192256 MB/sec
Texel Rate 12960 Mtexels/sec 128768 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 32192 Mpixels/sec
Unified Shaders 72 1536
Texture Mapping Units 24 128
Render Output Units 8 32
Bus Type GDDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 727 million 3540 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.0
OpenGL Version OpenGL 3.3 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high 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 amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially 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 GT 320

Amazon.com

Check prices at:

Geforce GTX 680

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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