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GeForce GT 420 vs Radeon HD 6450 (OEM) 1GB
Intro
The GeForce GT 420 features core speeds of 700 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR3 RAM. It features 48 SPUs as well as 8 TAUs and 4 Rasterization Operator Units.Compare those specifications to the Radeon HD 6450 (OEM) 1GB, which uses a 40 nm design. AMD has set the core speed at 750 MHz. The GDDR5 memory is set to run at a frequency of 900 MHz on this particular model. It features 160 SPUs along with 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 memory bandwidth, so theoretically they should perform the same. (explain)
Texel Rate
The Radeon HD 6450 (OEM) 1GB is just a bit (approximately 7%) more effective 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
If running with lots of anti-aliasing is important to you, then the Radeon HD 6450 (OEM) 1GB is the winner, but only just. (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 largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum 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.
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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).