GeForce GT 420 vs GeForce GTX Titan X

Intro

Compare those specs to the GeForce GTX Titan X, which features clock speeds of 1000 MHz on the GPU, and 1750 MHz on the 12288 MB of GDDR5 memory. It features 3072 SPUs along with 192 Texture Address Units and 96 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the GeForce GTX Titan X is 1067% quicker than the GeForce GT 420 overall, because of its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX Titan X should be a lot (about 3329%) more effective at texture filtering than the GeForce GT 420. (explain)

GeForce GTX Titan X		192000 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 186400 (3329%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX Titan X is the winner, by far. (explain)

GeForce GTX Titan X		96000 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 93200 (3329%)

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 maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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.