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GeForce GTS 450 1GB vs Radeon HD 4770
Intro
The GeForce GTS 450 1GB comes with core speeds of 783 MHz on the GPU, and 902 MHz on the 1024 MB of GDDR5 RAM. It features 192 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.Compare those specs to the Radeon HD 4770, which features a clock speed of 750 MHz and a GDDR5 memory speed of 800 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It features 640(128x5) SPUs, 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 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 will be a bit (more or less 4%) better at anisotropic 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
If using a high resolution is important to you, then the GeForce GTS 450 1GB is the winner, though only just barely. (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
GeForce GTS 450 1GB
Radeon HD 4770
Specifications
| Model | GeForce GTS 450 1GB | Radeon HD 4770 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | September 2010 | Apr 28, 2009 |
| Code Name | GF106 | RV740 |
| Memory | 1024 MB | 512 MB |
| Core Speed | 783 MHz | 750 MHz |
| Memory Speed | 3608 MHz | 3200 MHz |
| Power (Max TDP) | 106 watts | 80 watts |
| Bandwidth | 57728 MB/sec | 51200 MB/sec |
| Texel Rate | 25056 Mtexels/sec | 24000 Mtexels/sec |
| Pixel Rate | 12528 Mpixels/sec | 12000 Mpixels/sec |
| 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 |
| Fab Process | 40 nm | 40 nm |
| Transistors | 1170 million | 826 million |
| Bus | PCIe x16 | PCIe 2.0 x16 |
| DirectX Version | DirectX 11 | DirectX 10.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 3.0 |
Memory Bandwidth: Memory bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
GeForce GTS 450 1GB
Radeon HD 4770
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