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Radeon HD 3650 vs Radeon HD 7770
Intro
The Radeon HD 3650 has core clock speeds of 725 MHz on the GPU, and 800 MHz on the 1024 MB of GDDR4 RAM. It features 120(24x5) SPUs along with 8 TAUs and 4 Rasterization Operator Units.Compare those specs to the Radeon HD 7770, which features a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 3650 |
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78 Watts |
| Radeon HD 7770 |
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80 Watts |
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Memory Bandwidth
The Radeon HD 7770, in theory, should perform much faster than the Radeon HD 3650 in general. (explain)
| Radeon HD 7770 |
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72000 MB/sec |
| Radeon HD 3650 |
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25600 MB/sec |
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Texel Rate
The Radeon HD 7770 will be much (approximately 590%) better at texture filtering than the Radeon HD 3650. (explain)| Radeon HD 7770 |
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40000 Mtexels/sec |
| Radeon HD 3650 |
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5800 Mtexels/sec |
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Pixel Rate
If using high levels of AA is important to you, then the Radeon HD 7770 is a better choice, and very much so. (explain)| Radeon HD 7770 |
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16000 Mpixels/sec |
| Radeon HD 3650 |
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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 3650Amazon.com
Check prices at:
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Radeon HD 7770Amazon.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 3650 | Radeon HD 7770 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | 2008 | February 2012 |
| Code Name | RV635 PRO | Cape Verde XT |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 725 MHz | 1000 MHz |
| Memory Speed | 1600 MHz | 4500 MHz |
| Power (Max TDP) | 78 watts | 80 watts |
| Bandwidth | 25600 MB/sec | 72000 MB/sec |
| Texel Rate | 5800 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 2900 Mpixels/sec | 16000 Mpixels/sec |
| Unified Shaders | 120(24x5) | 640 |
| Texture Mapping Units | 8 | 40 |
| Render Output Units | 4 | 16 |
| Bus Type | GDDR4 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 55 nm | 28 nm |
| Transistors | (Unknown) million | 1500 million |
| Bus | PCIe 2.0 x16/AGP 8x | PCIe 3.0 x16 |
| DirectX Version | DirectX 10.1 | DirectX 11.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.2 |
Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 calculated by multiplying the total 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.
Radeon HD 3650Amazon.com
Check prices at:
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Radeon HD 7770Amazon.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
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