GeForce GT 420 vs GeForce GTX Titan Black

Intro

Compare all of that to the GeForce GTX Titan Black, which comes with clock speeds of 889 MHz on the GPU, and 1750 MHz on the 6144 MB of GDDR5 RAM. It features 2880 SPUs along with 240 Texture Address Units and 48 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 200 Watts (400%)

Memory Bandwidth

In theory, the GeForce GTX Titan Black should be 1067% quicker than the GeForce GT 420 in general, due to its higher data rate. (explain)

GeForce GTX Titan Black		336000 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 307200 (1067%)

Texel Rate

The GeForce GTX Titan Black is a lot (more or less 3710%) faster with regards to anisotropic filtering than the GeForce GT 420. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 207760 (3710%)

Pixel Rate

The GeForce GTX Titan Black is quite a bit (about 1424%) more effective at anti-aliasing than the GeForce GT 420, and will be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 39872 (1424%)

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 max amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. 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 fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.