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GeForce GTS 450 1GB vs Radeon HD 4770
Intro
The GeForce GTS 450 1GB has a GPU clock speed of 783 MHz, and the 1024 MB of GDDR5 RAM runs at 902 MHz through a 128-bit bus. It also is made up of 192 Stream Processors, 32 Texture Address Units, and 16 ROPs.Compare those specifications to the Radeon HD 4770, which makes use of a 40 nm design. ATi has clocked the core frequency at 750 MHz. The GDDR5 RAM runs at a frequency of 800 MHz on this specific model. It features 640(128x5) SPUs along with 32 TAUs and 16 ROPs.
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, in theory, should be a small bit faster than the Radeon HD 4770 overall. (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 is a small bit (about 4%) more effective at AF 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 should be a bit (approximately 4%) better at anti-aliasing than the Radeon HD 4770, and should be able to handle higher screen resolutions without losing too much performance. (explain)| GeForce GTS 450 1GB |
|
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 data (in units of megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 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 anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum 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 speed of the chip. The higher the texel rate, the better the video 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 most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number 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 also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
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