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Radeon HD 3870 1GB vs Radeon HD 6450 (OEM)
Intro
The Radeon HD 3870 1GB comes with a clock frequency of 775 MHz and a GDDR4 memory frequency of 1125 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 320(64x5) SPUs, 16 Texture Address Units, and 16 ROPs.Compare those specs to the Radeon HD 6450 (OEM), which has a core clock frequency of 625 MHz and a GDDR3 memory frequency of 800 MHz. It also features a 64-bit memory bus, and makes use of a 40 nm design. It features 160 SPUs, 8 Texture Address Units, and 4 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6450 (OEM) |
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31 Watts |
| Radeon HD 3870 1GB |
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106 Watts |
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Memory Bandwidth
Theoretically, the Radeon HD 3870 1GB should be much faster than the Radeon HD 6450 (OEM) overall. (explain)
| Radeon HD 3870 1GB |
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72000 MB/sec |
| Radeon HD 6450 (OEM) |
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12800 MB/sec |
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Texel Rate
The Radeon HD 3870 1GB will be quite a bit (approximately 148%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)| Radeon HD 3870 1GB |
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12400 Mtexels/sec |
| Radeon HD 6450 (OEM) |
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5000 Mtexels/sec |
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Pixel Rate
If using a high screen resolution is important to you, then the Radeon HD 3870 1GB is superior to the Radeon HD 6450 (OEM), by far. (explain)| Radeon HD 3870 1GB |
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12400 Mpixels/sec |
| Radeon HD 6450 (OEM) |
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2500 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 3870 1GBAmazon.com
Check prices at:
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Radeon HD 6450 (OEM)Amazon.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 3870 1GB | Radeon HD 6450 (OEM) |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Nov 19, 2007 | February 2011 |
| Code Name | RV670 XT | Caicos |
| Memory | 1024 MB | 512 MB |
| Core Speed | 775 MHz | 625 MHz |
| Memory Speed | 2250 MHz | 1600 MHz |
| Power (Max TDP) | 106 watts | 31 watts |
| Bandwidth | 72000 MB/sec | 12800 MB/sec |
| Texel Rate | 12400 Mtexels/sec | 5000 Mtexels/sec |
| Pixel Rate | 12400 Mpixels/sec | 2500 Mpixels/sec |
| Unified Shaders | 320(64x5) | 160 |
| Texture Mapping Units | 16 | 8 |
| Render Output Units | 16 | 4 |
| Bus Type | GDDR4 | GDDR3 |
| Bus Width | 256-bit | 64-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | (Unknown) million | 370 million |
| Bus | PCIe 2.0 x16/AGP 8x | PCIe 2.1 x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.
Radeon HD 3870 1GBAmazon.com
Check prices at:
|
Radeon HD 6450 (OEM)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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