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Radeon HD 4650 1GB vs Radeon HD 6950 2GB
Intro
The Radeon HD 4650 1GB has a GPU clock speed of 600 MHz, and the 1024 MB of GDDR3 memory runs at 700 MHz through a 128-bit bus. It also is comprised of 320(64x5) SPUs, 32 TAUs, and 8 Raster Operation Units.Compare that to the Radeon HD 6950 2GB, which features clock speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1408 SPUs as well as 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
The Radeon HD 6950 2GB should theoretically be quite a bit faster than the Radeon HD 4650 1GB overall. (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 is 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
If using high levels of AA is important to you, then the Radeon HD 6950 2GB is superior to the Radeon HD 4650 1GB, and very much so. (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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.
Radeon HD 4650 1GBAmazon.com
Check prices at:
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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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