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Radeon HD 3850 1GB vs Radeon HD 6450 (OEM)
Intro
The Radeon HD 3850 1GB features a clock frequency of 668 MHz and a GDDR3 memory speed of 828 MHz. It also makes use of a 256-bit memory bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.Compare those specifications to the Radeon HD 6450 (OEM), which uses a 40 nm design. AMD has clocked the core speed at 625 MHz. The GDDR3 RAM is set to run at a speed of 800 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 6450 (OEM) |
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31 Watts |
| Radeon HD 3850 1GB |
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75 Watts |
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Memory Bandwidth
Theoretically, the Radeon HD 3850 1GB should perform much faster than the Radeon HD 6450 (OEM) in general. (explain)
| Radeon HD 3850 1GB |
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52992 MB/sec |
| Radeon HD 6450 (OEM) |
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12800 MB/sec |
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Texel Rate
The Radeon HD 3850 1GB is much (about 114%) faster with regards to texture filtering than the Radeon HD 6450 (OEM). (explain)| Radeon HD 3850 1GB |
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10688 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 3850 1GB is a better choice, by far. (explain)| Radeon HD 3850 1GB |
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10688 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 3850 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 3850 1GB | Radeon HD 6450 (OEM) |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Nov 19, 2007 | February 2011 |
| Code Name | RV670 PRO | Caicos |
| Memory | 1024 MB | 512 MB |
| Core Speed | 668 MHz | 625 MHz |
| Memory Speed | 1656 MHz | 1600 MHz |
| Power (Max TDP) | 75 watts | 31 watts |
| Bandwidth | 52992 MB/sec | 12800 MB/sec |
| Texel Rate | 10688 Mtexels/sec | 5000 Mtexels/sec |
| Pixel Rate | 10688 Mpixels/sec | 2500 Mpixels/sec |
| Unified Shaders | 320(64x5) | 160 |
| Texture Mapping Units | 16 | 8 |
| Render Output Units | 16 | 4 |
| Bus Type | GDDR3 | 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 max amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units 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 in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.
Radeon HD 3850 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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