GeForce 8800 Ultra vs GeForce GT 420

Intro

Compare those specs to the GeForce GT 420, which features a core clock frequency of 700 MHz and a GDDR3 memory speed of 900 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It features 48 SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 121 Watts (242%)

Memory Bandwidth

In theory, the GeForce 8800 Ultra is 260% quicker than the GeForce GT 420 in general, because of its higher data rate. (explain)

GeForce 8800 Ultra		103680 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 74880 (260%)

Texel Rate

The GeForce 8800 Ultra should be much (more or less 599%) more effective at AF than the GeForce GT 420. (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 33568 (599%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 8800 Ultra is superior to the GeForce GT 420, by far. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 11888 (425%)

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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's interface 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 card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record 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 the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.