GeForce GT 420 vs Radeon RX 470

Intro

Compare all that to the Radeon RX 470, which uses a 14 nm design. AMD has set the core frequency at 926 MHz. The GDDR5 RAM is set to run at a speed of 1650 MHz on this model. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

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

Theoretically, the Radeon RX 470 should be quite a bit faster than 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 should be much (about 2017%) more effective at anisotropic filtering than the GeForce GT 420. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 470 is the winner, by a large margin. (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 largest amount of data (counted in MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.