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Radeon HD 5450 vs Radeon HD 6450 (OEM) 1GB
Intro
The Radeon HD 5450 comes with a GPU core speed of 650 MHz, and the 512 MB of DDR3 RAM runs at 800 MHz through a 64-bit bus. It also is comprised of 80(16x5) Stream Processors, 8 Texture Address Units, and 4 Raster Operation 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 runs at a speed of 900 MHz on this model. It features 160 SPUs along with 8 Texture Address Units and 4 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 5450 |
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19 Watts |
| Radeon HD 6450 (OEM) 1GB |
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31 Watts |
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Memory Bandwidth
Theoretically, the Radeon HD 6450 (OEM) 1GB should perform much faster than the Radeon HD 5450 overall. (explain)
| Radeon HD 6450 (OEM) 1GB |
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28800 MB/sec |
| Radeon HD 5450 |
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12800 MB/sec |
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Texel Rate
The Radeon HD 6450 (OEM) 1GB is just a bit (about 15%) more effective at texture filtering than the Radeon HD 5450. (explain)| Radeon HD 6450 (OEM) 1GB |
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6000 Mtexels/sec |
| Radeon HD 5450 |
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5200 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 superior to the Radeon HD 5450, but it probably won't make a huge difference. (explain)| Radeon HD 6450 (OEM) 1GB |
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3000 Mpixels/sec |
| Radeon HD 5450 |
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2600 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
Radeon HD 5450Amazon.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 | Radeon HD 5450 | Radeon HD 6450 (OEM) 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | February 4, 2010 | February 2011 |
| Code Name | Cedar PRO | Caicos |
| Memory | 512 MB | 1024 MB |
| Core Speed | 650 MHz | 750 MHz |
| Memory Speed | 1600 MHz | 3600 MHz |
| Power (Max TDP) | 19 watts | 31 watts |
| Bandwidth | 12800 MB/sec | 28800 MB/sec |
| Texel Rate | 5200 Mtexels/sec | 6000 Mtexels/sec |
| Pixel Rate | 2600 Mpixels/sec | 3000 Mpixels/sec |
| Unified Shaders | 80(16x5) | 160 |
| Texture Mapping Units | 8 | 8 |
| Render Output Units | 4 | 4 |
| Bus Type | DDR3 | GDDR5 |
| Bus Width | 64-bit | 64-bit |
| Fab Process | 40 nm | 40 nm |
| Transistors | 292 million | 370 million |
| Bus | PCIe 2.1 x16 | PCIe 2.1 x16 |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 3.2 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR 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 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 applied in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.
Radeon HD 5450Amazon.com
Check prices at:
|
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
6 Responses to “Radeon HD 5450 vs Radeon HD 6450 (OEM) 1GB”[...] [...]
the HD 5450 is a very good HTPC card. i added one to a tiny emachines pc, swapped in a blu ray player and that little machine is a movie monster. i do not play games on it so i dunno how games work on it.
I wonder why the actual performance difference in pixel/texel rate isn't that big as the difference in memory bandwith suggests.
I wonder why the actual performance difference in pixel/texel rate isn't that big as the difference in memory bandwidth suggests.
@Mentor54 - I doubt you'll see this, but --> The reason the real world differences aren't huge is simple. The memory bandwidth is a lot higher, but the actual core isn't pushing out much more.
if I install a 6450, do I need to upgrade the power supply?