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Radeon HD 3650 512MB vs Radeon HD 4650 1GB
Intro
The Radeon HD 3650 512MB makes use of a 55 nm design. AMD has set the core frequency at 725 MHz. The GDDR3 memory is set to run at a frequency of 800 MHz on this card. It features 120(24x5) SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.Compare all that to the Radeon HD 4650 1GB, which comes with clock speeds of 600 MHz on the GPU, and 700 MHz on the 1024 MB of GDDR3 RAM. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4650 1GB |
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55 Watts |
| Radeon HD 3650 512MB |
|
78 Watts |
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Memory Bandwidth
In theory, the Radeon HD 3650 512MB should perform just a bit faster than the Radeon HD 4650 1GB in general. (explain)
| Radeon HD 3650 512MB |
|
25600 MB/sec |
| Radeon HD 4650 1GB |
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22400 MB/sec |
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Texel Rate
The Radeon HD 4650 1GB will be much (about 231%) more effective at AF than the Radeon HD 3650 512MB. (explain)| Radeon HD 4650 1GB |
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19200 Mtexels/sec |
| Radeon HD 3650 512MB |
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5800 Mtexels/sec |
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Pixel Rate
The Radeon HD 4650 1GB will be quite a bit (about 66%) better at AA than the Radeon HD 3650 512MB, and also should be capable of handling higher resolutions while still performing well. (explain)| Radeon HD 4650 1GB |
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4800 Mpixels/sec |
| Radeon HD 3650 512MB |
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2900 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 3650 512MBAmazon.com
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Radeon HD 4650 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 3650 512MB | Radeon HD 4650 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | 2008 | Sep 10, 2008 |
| Code Name | RV635 PRO | RV730 PRO |
| Memory | 512 MB | 1024 MB |
| Core Speed | 725 MHz | 600 MHz |
| Memory Speed | 1600 MHz | 1400 MHz |
| Power (Max TDP) | 78 watts | 55 watts |
| Bandwidth | 25600 MB/sec | 22400 MB/sec |
| Texel Rate | 5800 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 2900 Mpixels/sec | 4800 Mpixels/sec |
| Unified Shaders | 120(24x5) | 320(64x5) |
| Texture Mapping Units | 8 | 32 |
| Render Output Units | 4 | 8 |
| Bus Type | GDDR3 | GDDR3 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 55 nm | 55 nm |
| Transistors | (Unknown) million | 514 million |
| Bus | PCIe 2.0 x16/AGP 8x | PCIe 2.0 x16, AGP 8x |
| DirectX Version | DirectX 10.1 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.
Radeon HD 3650 512MBAmazon.com
Check prices at:
|
Radeon HD 4650 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
One Response to “Radeon HD 3650 512MB vs Radeon HD 4650 1GB”[...] Radeon HD 3650 512MB vs Radeon HD 4650 1GB – Hwcompare.comCompare that to the Radeon HD 4650 1GB, which comes with a core clock … the results were calculated based on the card’s specifications, and real-world … [...]