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GeForce GTX 285 2GB vs GeForce GTX 650

Intro

The GeForce GTX 285 2GB comes with a GPU core speed of 648 MHz, and the 2048 MB of GDDR3 RAM is set to run at 1242 MHz through a 512-bit bus. It also is comprised of 240 SPUs, 80 TAUs, and 32 ROPs.

Compare all of that to the GeForce GTX 650, which has GPU core speed of 1058 MHz, and 1024 MB of GDDR5 RAM set to run at 1250 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce GTX 285 2GB 204 Watts
Difference: 140 Watts (219%)

Memory Bandwidth

The GeForce GTX 285 2GB should theoretically be quite a bit faster than the GeForce GTX 650 in general. (explain)

GeForce GTX 285 2GB 158976 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 78976 (99%)

Texel Rate

The GeForce GTX 285 2GB will be much (approximately 53%) faster with regards to AF than the GeForce GTX 650. (explain)

GeForce GTX 285 2GB 51840 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 17984 (53%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 285 2GB is a better choice, and very much so. (explain)

GeForce GTX 285 2GB 20736 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 3808 (22%)

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 GTX 285 2GB

Amazon.com

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GeForce GTX 650

Amazon.com

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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 GTX 285 2GB GeForce GTX 650
Manufacturer nVidia nVidia
Year January 15, 2009 September 2012
Code Name G200b GK107
Memory 2048 MB 1024 MB
Core Speed 648 MHz 1058 MHz
Memory Speed 2484 MHz 5000 MHz
Power (Max TDP) 204 watts 64 watts
Bandwidth 158976 MB/sec 80000 MB/sec
Texel Rate 51840 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 240 384
Texture Mapping Units 80 32
Render Output Units 32 16
Bus Type GDDR3 GDDR5
Bus Width 512-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 1300 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 285 2GB

Amazon.com

Check prices at:

GeForce GTX 650

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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