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Radeon HD 4650 1GB vs Radeon HD 6950 2GB
Intro
The Radeon HD 4650 1GB makes use of a 55 nm design. AMD has clocked the core speed at 600 MHz. The GDDR3 memory runs at a speed of 700 MHz on this particular card. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 Rasterization Operator Units.Compare those specifications to the Radeon HD 6950 2GB, which comes with GPU core speed of 800 MHz, and 2048 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also features 1408 SPUs, 88 TAUs, and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4650 1GB |
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55 Watts |
| Radeon HD 6950 2GB |
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200 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 6950 2GB should be quite a bit faster than the Radeon HD 4650 1GB in general. (explain)
| Radeon HD 6950 2GB |
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160000 MB/sec |
| Radeon HD 4650 1GB |
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22400 MB/sec |
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Texel Rate
The Radeon HD 6950 2GB should be quite a bit (more or less 267%) better at anisotropic filtering than the Radeon HD 4650 1GB. (explain)| Radeon HD 6950 2GB |
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70400 Mtexels/sec |
| Radeon HD 4650 1GB |
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19200 Mtexels/sec |
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Pixel Rate
The Radeon HD 6950 2GB will be a lot (about 433%) faster with regards to AA than the Radeon HD 4650 1GB, and also able to handle higher screen resolutions without losing too much performance. (explain)| Radeon HD 6950 2GB |
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25600 Mpixels/sec |
| Radeon HD 4650 1GB |
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4800 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 4650 1GBAmazon.com
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Radeon HD 6950 2GBAmazon.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 4650 1GB | Radeon HD 6950 2GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Sep 10, 2008 | December 2010 |
| Code Name | RV730 PRO | Cayman Pro |
| Memory | 1024 MB | 2048 MB |
| Core Speed | 600 MHz | 800 MHz |
| Memory Speed | 1400 MHz | 5000 MHz |
| Power (Max TDP) | 55 watts | 200 watts |
| Bandwidth | 22400 MB/sec | 160000 MB/sec |
| Texel Rate | 19200 Mtexels/sec | 70400 Mtexels/sec |
| Pixel Rate | 4800 Mpixels/sec | 25600 Mpixels/sec |
| Unified Shaders | 320(64x5) | 1408 |
| Texture Mapping Units | 32 | 88 |
| Render Output Units | 8 | 32 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 128-bit | 256-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 514 million | 2640 million |
| Bus | PCIe 2.0 x16, AGP 8x | PCIe x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock 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 many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
Radeon HD 4650 1GBAmazon.com
Check prices at:
|
Radeon HD 6950 2GBAmazon.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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