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GeForce GTX 285 1GB vs Geforce GTX 680


The GeForce GTX 285 1GB uses a 55 nm design. nVidia has clocked the core speed at 648 MHz. The GDDR3 memory is set to run at a speed of 1242 MHz on this specific model. It features 240 SPUs along with 80 TAUs and 32 ROPs.

Compare that to the Geforce GTX 680, which features core clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680 195 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 9 Watts (5%)

Memory Bandwidth

The Geforce GTX 680 should in theory be much faster than the GeForce GTX 285 1GB in general. (explain)

Geforce GTX 680 192256 MB/sec
GeForce GTX 285 1GB 158976 MB/sec
Difference: 33280 (21%)

Texel Rate

The Geforce GTX 680 should be a lot (approximately 148%) better at texture filtering than the GeForce GTX 285 1GB. (explain)

Geforce GTX 680 128768 Mtexels/sec
GeForce GTX 285 1GB 51840 Mtexels/sec
Difference: 76928 (148%)

Pixel Rate

The Geforce GTX 680 should be quite a bit (approximately 55%) more effective at FSAA than the GeForce GTX 285 1GB, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Geforce GTX 680 32192 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 11456 (55%)

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

Display Prices

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GeForce GTX 285 1GB

Geforce GTX 680

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.


Display Specifications

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Model GeForce GTX 285 1GB Geforce GTX 680
Manufacturer nVidia nVidia
Year January 15, 2009 March 2012
Code Name G200b GK104
Memory 1024 MB 2048 MB
Core Speed 648 MHz 1006 MHz
Memory Speed 2484 MHz 6008 MHz
Power (Max TDP) 204 watts 195 watts
Bandwidth 158976 MB/sec 192256 MB/sec
Texel Rate 51840 Mtexels/sec 128768 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 32192 Mpixels/sec
Unified Shaders 240 1536
Texture Mapping Units 80 128
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 3540 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 processed in one second. This number 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 card will be at 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 that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. 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 - the lower the bandwidth is, the lower the potential to reach the max fill rate.


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