GeForce GT 420 vs GeForce GTX 560 Ti

Intro

Compare that to the GeForce GTX 560 Ti, which features a clock speed of 822 MHz and a GDDR5 memory speed of 1002 MHz. It also features a 256-bit memory bus, and makes use of a 40 nm design. It features 384 SPUs, 64 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
GeForce GTX 560 Ti		170 Watts
	Difference: 120 Watts (240%)

Memory Bandwidth

The GeForce GTX 560 Ti should theoretically be a lot faster than the GeForce GT 420 in general. (explain)

GeForce GTX 560 Ti		128256 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 99456 (345%)

Texel Rate

The GeForce GTX 560 Ti should be a lot (about 839%) faster with regards to anisotropic filtering than the GeForce GT 420. (explain)

GeForce GTX 560 Ti		52608 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 47008 (839%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 560 Ti is the winner, by far. (explain)

GeForce GTX 560 Ti		26304 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 23504 (839%)

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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 can be 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.