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GeForce GT 420 vs Radeon HD 4550 512MB

Intro

The GeForce GT 420 comes with a GPU clock speed of 700 MHz, and the 2048 MB of GDDR3 RAM runs at 900 MHz through a 128-bit bus. It also is made up of 48 SPUs, 8 TAUs, and 4 Raster Operation Units.

Compare that to the Radeon HD 4550 512MB, which has GPU core speed of 600 MHz, and 512 MB of GDDR3 memory running at 800 MHz through a 64-bit bus. It also features 80(16x5) SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB 25 Watts
GeForce GT 420 50 Watts
Difference: 25 Watts (100%)

Memory Bandwidth

The GeForce GT 420, in theory, should perform a lot faster than the Radeon HD 4550 512MB in general. (explain)

GeForce GT 420 28800 MB/sec
Radeon HD 4550 512MB 12800 MB/sec
Difference: 16000 (125%)

Texel Rate

The GeForce GT 420 is a bit (more or less 17%) more effective at anisotropic filtering than the Radeon HD 4550 512MB. (explain)

GeForce GT 420 5600 Mtexels/sec
Radeon HD 4550 512MB 4800 Mtexels/sec
Difference: 800 (17%)

Pixel Rate

The GeForce GT 420 will be a little bit (about 17%) better at full screen anti-aliasing than the Radeon HD 4550 512MB, and also able to handle higher screen resolutions better. (explain)

GeForce GT 420 2800 Mpixels/sec
Radeon HD 4550 512MB 2400 Mpixels/sec
Difference: 400 (17%)

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 4550 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 4550 512MB
Manufacturer nVidia AMD
Year September 2010 Sep 30, 2008
Code Name GF108 RV710
Memory 2048 MB 512 MB
Core Speed 700 MHz 600 MHz
Memory Speed 1800 MHz 1600 MHz
Power (Max TDP) 50 watts 25 watts
Bandwidth 28800 MB/sec 12800 MB/sec
Texel Rate 5600 Mtexels/sec 4800 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 2400 Mpixels/sec
Unified Shaders 48 80(16x5)
Texture Mapping Units 8 8
Render Output Units 4 4
Bus Type GDDR3 GDDR3
Bus Width 128-bit 64-bit
Fab Process 40 nm 55 nm
Transistors 585 million 242 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 (counted in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of 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 rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GT 420

Amazon.com

Check prices at:

Radeon HD 4550 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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