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Radeon HD 6450 (OEM) vs Radeon HD 6770 1GB
Intro
The Radeon HD 6450 (OEM) has a clock frequency of 625 MHz and a GDDR3 memory frequency of 800 MHz. It also makes use of a 64-bit memory bus, and makes use of a 40 nm design. It is made up of 160 SPUs, 8 Texture Address Units, and 4 ROPs.Compare those specifications to the Radeon HD 6770 1GB, which has GPU clock speed of 900 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also is made up of 800 SPUs, 40 Texture Address Units, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6450 (OEM) |
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31 Watts |
| Radeon HD 6770 1GB |
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108 Watts |
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Memory Bandwidth
The Radeon HD 6770 1GB, in theory, should perform a lot faster than the Radeon HD 6450 (OEM) overall. (explain)
| Radeon HD 6770 1GB |
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67200 MB/sec |
| Radeon HD 6450 (OEM) |
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12800 MB/sec |
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Texel Rate
The Radeon HD 6770 1GB will be much (about 620%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)| Radeon HD 6770 1GB |
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36000 Mtexels/sec |
| Radeon HD 6450 (OEM) |
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5000 Mtexels/sec |
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Pixel Rate
The Radeon HD 6770 1GB will be a lot (more or less 476%) more effective at AA than the Radeon HD 6450 (OEM), and also should be able to handle higher resolutions without losing too much performance. (explain)| Radeon HD 6770 1GB |
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14400 Mpixels/sec |
| Radeon HD 6450 (OEM) |
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2500 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 6450 (OEM)Amazon.com
Check prices at:
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Radeon HD 6770 1GBAmazon.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 6450 (OEM) | Radeon HD 6770 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | February 2011 | January 2011 |
| Code Name | Caicos | Juniper XT |
| Memory | 512 MB | 1024 MB |
| Core Speed | 625 MHz | 900 MHz |
| Memory Speed | 1600 MHz | 4200 MHz |
| Power (Max TDP) | 31 watts | 108 watts |
| Bandwidth | 12800 MB/sec | 67200 MB/sec |
| Texel Rate | 5000 Mtexels/sec | 36000 Mtexels/sec |
| Pixel Rate | 2500 Mpixels/sec | 14400 Mpixels/sec |
| Unified Shaders | 160 | 800 |
| Texture Mapping Units | 8 | 40 |
| Render Output Units | 4 | 16 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 64-bit | 128-bit |
| Fab Process | 40 nm | 40 nm |
| Transistors | 370 million | 1040 million |
| Bus | PCIe 2.1 x16 | PCIe x16 |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 are applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core 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 in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
Radeon HD 6450 (OEM)Amazon.com
Check prices at:
|
Radeon HD 6770 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
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