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Radeon HD 4830 1GB vs Radeon HD 4890 1GB
Intro
The Radeon HD 4830 1GB comes with a core clock speed of 575 MHz and a GDDR4 memory speed of 900 MHz. It also uses a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.Compare that to the Radeon HD 4890 1GB, which comes with GPU core speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 975 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4830 1GB |
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95 Watts |
| Radeon HD 4890 1GB |
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190 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 4890 1GB should perform a lot faster than the Radeon HD 4830 1GB overall. (explain)
| Radeon HD 4890 1GB |
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124800 MB/sec |
| Radeon HD 4830 1GB |
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57600 MB/sec |
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Texel Rate
The Radeon HD 4890 1GB will be a lot (about 117%) faster with regards to AF than the Radeon HD 4830 1GB. (explain)| Radeon HD 4890 1GB |
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40000 Mtexels/sec |
| Radeon HD 4830 1GB |
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18400 Mtexels/sec |
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Pixel Rate
If using a high resolution is important to you, then the Radeon HD 4890 1GB is the winner, by a large margin. (explain)| Radeon HD 4890 1GB |
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16000 Mpixels/sec |
| Radeon HD 4830 1GB |
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9200 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 4830 1GBAmazon.com
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Radeon HD 4890 1GBAmazon.com
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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 4830 1GB | Radeon HD 4890 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Oct 21, 2008 | Apr 2, 2009 |
| Code Name | RV770 LE | RV790 XT |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 575 MHz | 1000 MHz |
| Memory Speed | 1800 MHz | 3900 MHz |
| Power (Max TDP) | 95 watts | 190 watts |
| Bandwidth | 57600 MB/sec | 124800 MB/sec |
| Texel Rate | 18400 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 9200 Mpixels/sec | 16000 Mpixels/sec |
| Unified Shaders | 640(128x5) | 800(160x5) |
| Texture Mapping Units | 32 | 40 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR4 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 55 nm | 55 nm |
| Transistors | 956 million | 959 million |
| Bus | PCIe 2.0 x16 | PCIe 2.0 x16 |
| DirectX Version | DirectX 10.1 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.
Radeon HD 4830 1GBAmazon.com
Check prices at:
|
Radeon HD 4890 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 “Radeon HD 4830 1GB vs Radeon HD 4890 1GB”rrtrytyyrtytyryrtyfty
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