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GeForce GT 420 vs Radeon HD 3470 512MB

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 HD 3470 512MB, which has a clock frequency of 800 MHz and a GDDR3 memory speed of 950 MHz. It also uses a 128-bit bus, and uses a 55 nm design. It features 40(8x5) SPUs, 4 TAUs, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3470 512MB should in theory perform a little bit faster than the GeForce GT 420 overall. (explain)

Radeon HD 3470 512MB 30400 MB/sec
GeForce GT 420 28800 MB/sec
Difference: 1600 (6%)

Texel Rate

The GeForce GT 420 should be a lot (about 75%) faster with regards to texture filtering than the Radeon HD 3470 512MB. (explain)

GeForce GT 420 5600 Mtexels/sec
Radeon HD 3470 512MB 3200 Mtexels/sec
Difference: 2400 (75%)

Pixel Rate

The Radeon HD 3470 512MB should be a little bit (more or less 14%) better at FSAA than the GeForce GT 420, and also will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 3470 512MB 3200 Mpixels/sec
GeForce GT 420 2800 Mpixels/sec
Difference: 400 (14%)

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 3470 512MB

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 3470 512MB
Manufacturer nVidia AMD
Year September 2010 2008
Code Name GF108 RV620 PRO
Memory 2048 MB 512 MB
Core Speed 700 MHz 800 MHz
Memory Speed 1800 MHz 1900 MHz
Power (Max TDP) 50 watts (Unknown) watts
Bandwidth 28800 MB/sec 30400 MB/sec
Texel Rate 5600 Mtexels/sec 3200 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 3200 Mpixels/sec
Unified Shaders 48 40(8x5)
Texture Mapping Units 8 4
Render Output Units 4 4
Bus Type GDDR3 GDDR3
Bus Width 128-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 585 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GT 420

Amazon.com

Check prices at:

Radeon HD 3470 512MB

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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