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GeForce GTS 450 1GB vs Radeon HD 4770
Intro
The GeForce GTS 450 1GB has a clock speed of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It is made up of 192 SPUs, 32 TAUs, and 16 Raster Operation Units.Compare that to the Radeon HD 4770, which has a clock frequency of 750 MHz and a GDDR5 memory frequency of 800 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is comprised of 640(128x5) SPUs, 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 |
|
106 Watts |
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Memory Bandwidth
The GeForce GTS 450 1GB should theoretically be just a bit faster than the Radeon HD 4770 in general. (explain)
| GeForce GTS 450 1GB |
|
57728 MB/sec |
| Radeon HD 4770 |
|
51200 MB/sec |
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Texel Rate
The GeForce GTS 450 1GB should be just a bit (more or less 4%) faster with regards to texture filtering than the Radeon HD 4770. (explain)| GeForce GTS 450 1GB |
|
25056 Mtexels/sec |
| Radeon HD 4770 |
|
24000 Mtexels/sec |
|
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Pixel Rate
The GeForce GTS 450 1GB is a little bit (approximately 4%) more effective at full screen anti-aliasing than the Radeon HD 4770, and also should be able to handle higher screen resolutions while still performing well. (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 maximum amount of information (counted in MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the 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 number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.
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