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GeForce GTS 450 1GB vs Radeon HD 4770
Intro
The GeForce GTS 450 1GB features a core clock speed of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It is comprised of 192 SPUs, 32 TAUs, and 16 ROPs.Compare all that to the Radeon HD 4770, which comes with core clock speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator 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
In theory, the GeForce GTS 450 1GB should be 13% faster than the Radeon HD 4770 overall, because of its higher data rate. (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 (about 4%) better 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 will be a little bit (more or less 4%) better at full screen anti-aliasing than the Radeon HD 4770, and also capable of handling higher screen resolutions without slowing down too much. (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 (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, 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 is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.
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