GeForce GT 420 vs Radeon RX 470

Intro

Compare all of that to the Radeon RX 470, which uses a 14 nm design. AMD has clocked the core speed at 926 MHz. The GDDR5 memory is set to run at a frequency of 1650 MHz on this card. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
Radeon RX 470		120 Watts
	Difference: 70 Watts (140%)

Memory Bandwidth

Performance-wise, the Radeon RX 470 should theoretically be much superior to the GeForce GT 420 in general. (explain)

Radeon RX 470		211200 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 182400 (633%)

Texel Rate

The Radeon RX 470 is much (more or less 2017%) better at texture filtering than the GeForce GT 420. (explain)

Radeon RX 470		118528 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 112928 (2017%)

Pixel Rate

The Radeon RX 470 should be much (approximately 958%) better at FSAA than the GeForce GT 420, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 470		29632 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 26832 (958%)

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 maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at 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 record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.