GeForce GT 420 vs Nvidia Titan X

Intro

Compare that to the Nvidia Titan X, which comes with a core clock speed of 1417 MHz and a GDDR5X memory speed of 1251 MHz. It also features a 384-bit bus, and makes use of a 16 nm design. It is comprised of 3584 SPUs, 224 Texture Address Units, and 96 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the Nvidia Titan X should theoretically be a lot better than the GeForce GT 420 overall. (explain)

Nvidia Titan X		491520 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 462720 (1607%)

Texel Rate

The Nvidia Titan X will be quite a bit (more or less 5568%) faster with regards to AF than the GeForce GT 420. (explain)

Nvidia Titan X		317408 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 311808 (5568%)

Pixel Rate

The Nvidia Titan X should be a lot (approximately 4758%) more effective at FSAA than the GeForce GT 420, and should be able to handle higher resolutions while still performing well. (explain)

Nvidia Titan X		136032 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 133232 (4758%)

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 MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 processed per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.