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GeForce 8800 GT 256MB vs GeForce GTX 650

Intro

The GeForce 8800 GT 256MB comes with a core clock frequency of 600 MHz and a GDDR3 memory frequency of 700 MHz. It also uses a 256-bit bus, and makes use of a 65 nm design. It is comprised of 112 SPUs, 56 TAUs, and 16 ROPs.

Compare all that to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has clocked the core speed at 1058 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this specific model. It features 384 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

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

As far as performance goes, the GeForce GTX 650 should theoretically be a lot better than the GeForce 8800 GT 256MB overall. (explain)

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

Texel Rate

The GeForce GTX 650 is just a bit (more or less 1%) better 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

If using lots of anti-aliasing is important to you, then the GeForce GTX 650 is a better choice, by a large margin. (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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must 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 higher screen 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 by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few 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.

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