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GeForce GT 420 vs Radeon HD 6450 (OEM) 1GB
Intro
The GeForce GT 420 comes with a GPU core speed of 700 MHz, and the 2048 MB of GDDR3 RAM runs at 900 MHz through a 128-bit bus. It also is comprised of 48 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.Compare those specifications to the Radeon HD 6450 (OEM) 1GB, which comes with GPU clock speed of 750 MHz, and 1024 MB of GDDR5 RAM set to run at 900 MHz through a 64-bit bus. It also is comprised of 160 Stream Processors, 8 TAUs, and 4 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6450 (OEM) 1GB |
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31 Watts |
| GeForce GT 420 |
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50 Watts |
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Memory Bandwidth
Both cards have exactly the same bandwidth, so in theory they should have identical performance. (explain)
Texel Rate
The Radeon HD 6450 (OEM) 1GB should be a little bit (more or less 7%) better at AF than the GeForce GT 420. (explain)| Radeon HD 6450 (OEM) 1GB |
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6000 Mtexels/sec |
| GeForce GT 420 |
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5600 Mtexels/sec |
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Pixel Rate
The Radeon HD 6450 (OEM) 1GB is a little bit (more or less 7%) better at AA than the GeForce GT 420, and will be able to handle higher screen resolutions better. (explain)| Radeon HD 6450 (OEM) 1GB |
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3000 Mpixels/sec |
| GeForce GT 420 |
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2800 Mpixels/sec |
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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
GeForce GT 420Amazon.com
Check prices at:
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Radeon HD 6450 (OEM) 1GBAmazon.com
Check prices at:
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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
| Model | GeForce GT 420 | Radeon HD 6450 (OEM) 1GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | September 2010 | February 2011 |
| Code Name | GF108 | Caicos |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 700 MHz | 750 MHz |
| Memory Speed | 1800 MHz | 3600 MHz |
| Power (Max TDP) | 50 watts | 31 watts |
| Bandwidth | 28800 MB/sec | 28800 MB/sec |
| Texel Rate | 5600 Mtexels/sec | 6000 Mtexels/sec |
| Pixel Rate | 2800 Mpixels/sec | 3000 Mpixels/sec |
| Unified Shaders | 48 | 160 |
| Texture Mapping Units | 8 | 8 |
| Render Output Units | 4 | 4 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 128-bit | 64-bit |
| Fab Process | 40 nm | 40 nm |
| Transistors | 585 million | 370 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 information (counted in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 per second. This 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 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 the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.
GeForce GT 420Amazon.com
Check prices at:
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Radeon HD 6450 (OEM) 1GBAmazon.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.
|
Comments
2 Responses to “GeForce GT 420 vs Radeon HD 6450 (OEM) 1GB”What does these figures mean when it comes to practical usage? I wish to buy a computer on which I can watch a full screen HD video, 1920×1080, via the HDMI on my new flat screen tv. Is it enough with a graphics card like GeForce GT 420 for this purpose?
This is obviously not a comment, but I would be very greatful for an answer to this question.
Best regards
Kjell Adrian
Sweden
You would be better off with the Radeon 6450 as it's slightly faster and consumes less power. I'm using a Sapphire Radeon 6450 (1GB DDR3 model) with my HTPC and it handles all video perfectly including Blu-ray and 3D Blu-ray (1080p).