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GeForce 8800 GT 512MB vs GeForce GTX 650

Intro

The GeForce 8800 GT 512MB has core clock speeds of 600 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 112 SPUs as well as 56 TAUs and 16 ROPs.

Compare all of that to the GeForce GTX 650, which uses a 28 nm design. nVidia has clocked the core speed at 1058 MHz. The GDDR5 memory works at a speed of 1250 MHz on this model. It features 384 SPUs along with 32 TAUs 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 512MB 105 Watts
Difference: 41 Watts (64%)

Memory Bandwidth

The GeForce GTX 650, in theory, should perform quite a bit faster than the GeForce 8800 GT 512MB in general. (explain)

GeForce GTX 650 80000 MB/sec
GeForce 8800 GT 512MB 57600 MB/sec
Difference: 22400 (39%)

Texel Rate

The GeForce GTX 650 should be a small bit (about 1%) better at texture filtering than the GeForce 8800 GT 512MB. (explain)

GeForce GTX 650 33856 Mtexels/sec
GeForce 8800 GT 512MB 33600 Mtexels/sec
Difference: 256 (1%)

Pixel Rate

The GeForce GTX 650 is much (more or less 76%) faster with regards to FSAA than the GeForce 8800 GT 512MB, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce 8800 GT 512MB 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

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GeForce 8800 GT 512MB

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

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Model GeForce 8800 GT 512MB GeForce GTX 650
Manufacturer nVidia nVidia
Year Oct 2007 September 2012
Code Name G92 GK107
Memory 512 MB 1024 MB
Core Speed 600 MHz 1058 MHz
Memory Speed 1800 MHz 5000 MHz
Power (Max TDP) 105 watts 64 watts
Bandwidth 57600 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: Bandwidth is the max amount of information (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 are applied in one 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 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 amount of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. 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 also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

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