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GeForce GT 420 vs Radeon HD 6570 (OEM) 2GB

Intro

The GeForce GT 420 uses a 40 nm design. nVidia has clocked the core frequency at 700 MHz. The GDDR3 RAM is set to run at a frequency of 900 MHz on this particular model. It features 48 SPUs as well as 8 Texture Address Units and 4 ROPs.

Compare that to the Radeon HD 6570 (OEM) 2GB, which comes with GPU core speed of 650 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 128-bit bus. It also features 480 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The Radeon HD 6570 (OEM) 2GB should in theory be a lot faster than the GeForce GT 420 overall. (explain)

Radeon HD 6570 (OEM) 2GB 64000 MB/sec
GeForce GT 420 28800 MB/sec
Difference: 35200 (122%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB should be quite a bit (more or less 179%) more effective at anisotropic filtering than the GeForce GT 420. (explain)

Radeon HD 6570 (OEM) 2GB 15600 Mtexels/sec
GeForce GT 420 5600 Mtexels/sec
Difference: 10000 (179%)

Pixel Rate

The Radeon HD 6570 (OEM) 2GB should be much (about 86%) better at full screen anti-aliasing than the GeForce GT 420, and also will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 6570 (OEM) 2GB 5200 Mpixels/sec
GeForce GT 420 2800 Mpixels/sec
Difference: 2400 (86%)

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 HD 6570 (OEM) 2GB

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 HD 6570 (OEM) 2GB
Manufacturer nVidia AMD
Year September 2010 February 2011
Code Name GF108 Turks
Memory 2048 MB 1024 MB
Core Speed 700 MHz 650 MHz
Memory Speed 1800 MHz 4000 MHz
Power (Max TDP) 50 watts 50 watts
Bandwidth 28800 MB/sec 64000 MB/sec
Texel Rate 5600 Mtexels/sec 15600 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 5200 Mpixels/sec
Unified Shaders 48 480
Texture Mapping Units 8 24
Render Output Units 4 8
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 585 million 715 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling 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 write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GT 420

Amazon.com

Check prices at:

Radeon HD 6570 (OEM) 2GB

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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