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GeForce 8800 GT 256MB vs GeForce GTX 650

Intro

The GeForce 8800 GT 256MB features a GPU core clock speed of 600 MHz, and the 256 MB of GDDR3 RAM runs at 700 MHz through a 256-bit bus. It also is comprised of 112 Stream Processors, 56 TAUs, and 16 Raster Operation Units.

Compare that to the GeForce GTX 650, which features clock speeds of 1058 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 384 SPUs along with 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 8800 GT 256MB 105 Watts
Difference: 41 Watts (64%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 is 79% faster than the GeForce 8800 GT 256MB overall, because of its higher bandwidth. (explain)

GeForce GTX 650 80000 MB/sec
GeForce 8800 GT 256MB 44800 MB/sec
Difference: 35200 (79%)

Texel Rate

The GeForce GTX 650 will be a little bit (more or less 1%) more effective at anisotropic filtering than the GeForce 8800 GT 256MB. (explain)

GeForce GTX 650 33856 Mtexels/sec
GeForce 8800 GT 256MB 33600 Mtexels/sec
Difference: 256 (1%)

Pixel Rate

The GeForce GTX 650 should be a lot (more or less 76%) more effective at AA than the GeForce 8800 GT 256MB, and capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce 8800 GT 256MB 9600 Mpixels/sec
Difference: 7328 (76%)

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 8800 GT 256MB

Amazon.com

GeForce GTX 650

Amazon.com

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

Display Specifications

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Model GeForce 8800 GT 256MB GeForce GTX 650
Manufacturer nVidia nVidia
Year Dec 2007 September 2012
Code Name G92 GK107
Memory 256 MB 2048 MB
Core Speed 600 MHz 1058 MHz
Memory Speed 1400 MHz 5000 MHz
Power (Max TDP) 105 watts 64 watts
Bandwidth 44800 MB/sec 80000 MB/sec
Texel Rate 33600 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 112 384
Texture Mapping Units 56 32
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65 nm 28 nm
Transistors 754 million 1300 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, 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 is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

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