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GeForce 8800 GT 1GB vs GeForce GTX 650


Intro

The GeForce 8800 GT 1GB makes use of a 65 nm design. nVidia has set the core speed at 600 MHz. The GDDR3 memory is set to run at a speed of 900 MHz on this card. It features 112 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has set the core speed at 1058 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this specific card. It features 384 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce 8800 GT 1GB 105 Watts
Difference: 41 Watts (64%)

Memory Bandwidth

In theory, the GeForce GTX 650 should be 39% quicker than the GeForce 8800 GT 1GB overall, due to its greater bandwidth. (explain)

GeForce GTX 650 80000 MB/sec
GeForce 8800 GT 1GB 57600 MB/sec
Difference: 22400 (39%)

Texel Rate

The GeForce GTX 650 should be just a bit (more or less 1%) faster with regards to anisotropic filtering than the GeForce 8800 GT 1GB. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 650 is the winner, by a large margin. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce 8800 GT 1GB 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

GeForce 8800 GT 1GB

GeForce GTX 650

Specifications

Display Specifications

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Model GeForce 8800 GT 1GB GeForce GTX 650
Manufacturer nVidia nVidia
Year Dec 2007 September 2012
Code Name G92 GK107
Memory 1024 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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

GeForce 8800 GT 1GB

GeForce GTX 650

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