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GeForce GT 450 (OEM) vs Radeon HD 7770
Intro
The GeForce GT 450 (OEM) has a clock speed of 790 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 192-bit memory bus, and makes use of a 40 nm design. It features 144 SPUs, 24 TAUs, and 24 ROPs.Compare all that to the Radeon HD 7770, which comes with a clock speed of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7770 |
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80 Watts |
| GeForce GT 450 (OEM) |
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106 Watts |
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Memory Bandwidth
Performance-wise, the GeForce GT 450 (OEM) should in theory be a lot better than the Radeon HD 7770 in general. (explain)
| GeForce GT 450 (OEM) |
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96000 MB/sec |
| Radeon HD 7770 |
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72000 MB/sec |
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Texel Rate
The Radeon HD 7770 is quite a bit (approximately 111%) faster with regards to texture filtering than the GeForce GT 450 (OEM). (explain)| Radeon HD 7770 |
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40000 Mtexels/sec |
| GeForce GT 450 (OEM) |
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18960 Mtexels/sec |
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Pixel Rate
If running with high levels of AA is important to you, then the GeForce GT 450 (OEM) is the winner, but only just. (explain)| GeForce GT 450 (OEM) |
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18960 Mpixels/sec |
| Radeon HD 7770 |
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16000 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
GeForce GT 450 (OEM)Amazon.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 | GeForce GT 450 (OEM) | Radeon HD 7770 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | October 2010 | February 2012 |
| Code Name | GF106 | Cape Verde XT |
| Memory | 1536 MB | 1024 MB |
| Core Speed | 790 MHz | 1000 MHz |
| Memory Speed | 4000 MHz | 4500 MHz |
| Power (Max TDP) | 106 watts | 80 watts |
| Bandwidth | 96000 MB/sec | 72000 MB/sec |
| Texel Rate | 18960 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 18960 Mpixels/sec | 16000 Mpixels/sec |
| Unified Shaders | 144 | 640 |
| Texture Mapping Units | 24 | 40 |
| Render Output Units | 24 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 128-bit |
| Fab Process | 40 nm | 28 nm |
| Transistors | 1170 million | 1500 million |
| Bus | PCIe x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.2 |
Memory Bandwidth: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one 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 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 number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
GeForce GT 450 (OEM)Amazon.com
Check prices at:
|
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.
|
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