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GeForce 8800 GTS (G92) vs GeForce GT 420

Intro

The GeForce 8800 GTS (G92) features a core clock frequency of 650 MHz and a GDDR3 memory speed of 970 MHz. It also makes use of a 256-bit memory bus, and makes use of a 65 nm design. It is made up of 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the GeForce GT 420, which has clock speeds of 700 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR3 RAM. It features 48 SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420 50 Watts
GeForce 8800 GTS (G92) 135 Watts
Difference: 85 Watts (170%)

Memory Bandwidth

In theory, the GeForce 8800 GTS (G92) should be 116% faster than the GeForce GT 420 in general, due to its higher data rate. (explain)

GeForce 8800 GTS (G92) 62080 MB/sec
GeForce GT 420 28800 MB/sec
Difference: 33280 (116%)

Texel Rate

The GeForce 8800 GTS (G92) will be much (more or less 643%) more effective at AF than the GeForce GT 420. (explain)

GeForce 8800 GTS (G92) 41600 Mtexels/sec
GeForce GT 420 5600 Mtexels/sec
Difference: 36000 (643%)

Pixel Rate

The GeForce 8800 GTS (G92) is a lot (more or less 271%) more effective at FSAA than the GeForce GT 420, and also capable of handling higher screen resolutions better. (explain)

GeForce 8800 GTS (G92) 10400 Mpixels/sec
GeForce GT 420 2800 Mpixels/sec
Difference: 7600 (271%)

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 GTS (G92)

Amazon.com

Check prices at:

GeForce GT 420

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.

Specifications

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Model GeForce 8800 GTS (G92) GeForce GT 420
Manufacturer nVidia nVidia
Year Dec 2007 September 2010
Code Name G92 GF108
Memory 512 MB 2048 MB
Core Speed 650 MHz 700 MHz
Memory Speed 1940 MHz 1800 MHz
Power (Max TDP) 135 watts 50 watts
Bandwidth 62080 MB/sec 28800 MB/sec
Texel Rate 41600 Mtexels/sec 5600 Mtexels/sec
Pixel Rate 10400 Mpixels/sec 2800 Mpixels/sec
Unified Shaders 128 48
Texture Mapping Units 64 8
Render Output Units 16 4
Bus Type GDDR3 GDDR3
Bus Width 256-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 754 million 585 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 maximum amount of data (in units of MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 8800 GTS (G92)

Amazon.com

Check prices at:

GeForce GT 420

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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