GeForce GT 420 vs Radeon RX 470 4GB

Intro

Compare those specs to the Radeon RX 470 4GB, which uses a 14 nm design. AMD has set the core speed at 926 MHz. The GDDR5 memory runs at a speed of 1650 MHz on this card. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
Radeon RX 470 4GB		120 Watts
	Difference: 70 Watts (140%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 470 4GB is 633% quicker than the GeForce GT 420 overall, because of its higher bandwidth. (explain)

Radeon RX 470 4GB		211200 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 182400 (633%)

Texel Rate

The Radeon RX 470 4GB is a lot (approximately 2017%) faster with regards to anisotropic filtering than the GeForce GT 420. (explain)

Radeon RX 470 4GB		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 4GB is superior to the GeForce GT 420, by far. (explain)

Radeon RX 470 4GB		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 MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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