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GeForce 8800 GT 512MB vs GeForce GT 450 (OEM)

Intro

The GeForce 8800 GT 512MB makes use of a 65 nm design. nVidia has set the core frequency at 600 MHz. The GDDR3 memory works at a frequency of 900 MHz on this specific card. It features 112 SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the GeForce GT 450 (OEM), which makes use of a 40 nm design. nVidia has clocked the core speed at 790 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this particular model. It features 144 SPUs along with 24 TAUs and 24 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB 105 Watts
GeForce GT 450 (OEM) 106 Watts
Difference: 1 Watts (1%)

Memory Bandwidth

The GeForce GT 450 (OEM), in theory, should be a lot faster than the GeForce 8800 GT 512MB overall. (explain)

GeForce GT 450 (OEM) 96000 MB/sec
GeForce 8800 GT 512MB 57600 MB/sec
Difference: 38400 (67%)

Texel Rate

The GeForce 8800 GT 512MB is a lot (more or less 77%) more effective at texture filtering than the GeForce GT 450 (OEM). (explain)

GeForce 8800 GT 512MB 33600 Mtexels/sec
GeForce GT 450 (OEM) 18960 Mtexels/sec
Difference: 14640 (77%)

Pixel Rate

The GeForce GT 450 (OEM) should be quite a bit (more or less 98%) faster with regards to full screen anti-aliasing than the GeForce 8800 GT 512MB, and able to handle higher resolutions without slowing down too much. (explain)

GeForce GT 450 (OEM) 18960 Mpixels/sec
GeForce 8800 GT 512MB 9600 Mpixels/sec
Difference: 9360 (98%)

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

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GeForce GT 450 (OEM)

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 8800 GT 512MB GeForce GT 450 (OEM)
Manufacturer nVidia nVidia
Year Oct 2007 October 2010
Code Name G92 GF106
Memory 512 MB 1536 MB
Core Speed 600 MHz 790 MHz
Memory Speed 1800 MHz 4000 MHz
Power (Max TDP) 105 watts 106 watts
Bandwidth 57600 MB/sec 96000 MB/sec
Texel Rate 33600 Mtexels/sec 18960 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 18960 Mpixels/sec
Unified Shaders 112 144
Texture Mapping Units 56 24
Render Output Units 16 24
Bus Type GDDR3 GDDR5
Bus Width 256-bit 192-bit
Fab Process 65 nm 40 nm
Transistors 754 million 1170 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 8800 GT 512MB

Amazon.com

Check prices at:

GeForce GT 450 (OEM)

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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