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GeForce GT 420 vs Radeon RX 580

Intro

The GeForce GT 420 comes with core speeds of 700 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR3 memory. It features 48 SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Compare those specs to the Radeon RX 580, which features a clock frequency of 1257 MHz and a GDDR5 memory speed of 2000 MHz. It also features a 256-bit memory bus, and uses a 14 nm design. It is made up of 2304 SPUs, 144 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420 50 Watts
Radeon RX 580 185 Watts
Difference: 135 Watts (270%)

Memory Bandwidth

Performance-wise, the Radeon RX 580 should in theory be much superior to the GeForce GT 420 overall. (explain)

Radeon RX 580 262144 MB/sec
GeForce GT 420 28800 MB/sec
Difference: 233344 (810%)

Texel Rate

The Radeon RX 580 is a lot (approximately 3132%) faster with regards to texture filtering than the GeForce GT 420. (explain)

Radeon RX 580 181008 Mtexels/sec
GeForce GT 420 5600 Mtexels/sec
Difference: 175408 (3132%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 580 is a better choice, by far. (explain)

Radeon RX 580 40224 Mpixels/sec
GeForce GT 420 2800 Mpixels/sec
Difference: 37424 (1337%)

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

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GeForce GT 420

Amazon.com

Check prices at:

Radeon RX 580

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GT 420 Radeon RX 580
Manufacturer nVidia AMD
Year September 2010 April 2017
Code Name GF108 Polaris 20
Memory 2048 MB 8192 MB
Core Speed 700 MHz 1257 MHz
Memory Speed 1800 MHz 8000 MHz
Power (Max TDP) 50 watts 185 watts
Bandwidth 28800 MB/sec 262144 MB/sec
Texel Rate 5600 Mtexels/sec 181008 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 40224 Mpixels/sec
Unified Shaders 48 2304
Texture Mapping Units 8 144
Render Output Units 4 32
Bus Type GDDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 14 nm
Transistors 585 million 5700 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

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

Display Prices

Hide Prices

GeForce GT 420

Amazon.com

Check prices at:

Radeon RX 580

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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