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GeForce GTS 450 1GB vs Radeon HD 4770
Intro
The GeForce GTS 450 1GB makes use of a 40 nm design. nVidia has set the core frequency at 783 MHz. The GDDR5 RAM runs at a frequency of 902 MHz on this specific card. It features 192 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.Compare all that to the Radeon HD 4770, which has a GPU core clock speed of 750 MHz, and 512 MB of GDDR5 memory set to run at 800 MHz through a 128-bit bus. It also is made up of 640(128x5) Stream Processors, 32 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4770 |
|
80 Watts |
| GeForce GTS 450 1GB |
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106 Watts |
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Memory Bandwidth
The GeForce GTS 450 1GB, in theory, should perform a little bit faster than the Radeon HD 4770 in general. (explain)
| GeForce GTS 450 1GB |
|
57728 MB/sec |
| Radeon HD 4770 |
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51200 MB/sec |
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Texel Rate
The GeForce GTS 450 1GB is a little bit (more or less 4%) more effective at texture filtering than the Radeon HD 4770. (explain)| GeForce GTS 450 1GB |
|
25056 Mtexels/sec |
| Radeon HD 4770 |
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24000 Mtexels/sec |
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Pixel Rate
The GeForce GTS 450 1GB will be just a bit (more or less 4%) faster with regards to full screen anti-aliasing than the Radeon HD 4770, and also capable of handling higher screen resolutions more effectively. (explain)| GeForce GTS 450 1GB |
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12528 Mpixels/sec |
| Radeon HD 4770 |
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12000 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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
GeForce GTS 450 1GBAmazon.com
Other US-based stores
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Radeon HD 4770Amazon.com
Other US-based stores
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Specifications
| Model | GeForce GTS 450 1GB | Radeon HD 4770 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | September 2010 | Apr 28, 2009 |
| Code Name | GF106 | RV740 |
| Fab Process | 40 nm | 40 nm |
| Bus | PCIe x16 | PCIe 2.0 x16 |
| Memory | 1024 MB | 512 MB |
| Core Speed | 783 MHz | 750 MHz |
| Shader Speed | 1566 MHz | (N/A) MHz |
| Memory Speed | 902 MHz (3608 MHz effective) | 800 MHz (3200 MHz effective) |
| Unified Shaders | 192 | 640(128x5) |
| Texture Mapping Units | 32 | 32 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| DirectX Version | DirectX 11 | DirectX 10.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 3.0 |
| Power (Max TDP) | 106 watts | 80 watts |
| Shader Model | 5.0 | 4.1 |
| Bandwidth | 57728 MB/sec | 51200 MB/sec |
| Texel Rate | 25056 Mtexels/sec | 24000 Mtexels/sec |
| Pixel Rate | 12528 Mpixels/sec | 12000 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units 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 applied in one second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.
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