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GeForce GT 450 (OEM) vs Radeon HD 4870 512MB
Intro
The GeForce GT 450 (OEM) features core speeds of 790 MHz on the GPU, and 1000 MHz on the 1536 MB of GDDR5 RAM. It features 144 SPUs as well as 24 Texture Address Units and 24 Rasterization Operator Units.Compare all that to the Radeon HD 4870 512MB, which features GPU core speed of 750 MHz, and 512 MB of GDDR5 RAM running at 900 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 450 (OEM) |
|
106 Watts |
| Radeon HD 4870 512MB |
|
150 Watts |
|
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Memory Bandwidth
Theoretically speaking, the Radeon HD 4870 512MB is 20% quicker than the GeForce GT 450 (OEM) overall, because of its higher bandwidth. (explain)
| Radeon HD 4870 512MB |
|
115200 MB/sec |
| GeForce GT 450 (OEM) |
|
96000 MB/sec |
|
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Texel Rate
The Radeon HD 4870 512MB will be much (about 58%) more effective at anisotropic filtering than the GeForce GT 450 (OEM). (explain)| Radeon HD 4870 512MB |
|
30000 Mtexels/sec |
| GeForce GT 450 (OEM) |
|
18960 Mtexels/sec |
|
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Pixel Rate
The GeForce GT 450 (OEM) should be a lot (about 58%) better at FSAA than the Radeon HD 4870 512MB, and also able to handle higher screen resolutions without losing too much performance. (explain)| GeForce GT 450 (OEM) |
|
18960 Mpixels/sec |
| Radeon HD 4870 512MB |
|
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 GT 450 (OEM)Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 4870 512MBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
Specifications
| Model | GeForce GT 450 (OEM) | Radeon HD 4870 512MB |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | October 2010 | Jun 25, 2008 |
| Code Name | GF106 | RV770 XT |
| Fab Process | 40 nm | 55 nm |
| Bus | PCIe x16 | PCIe 2.0 x16 |
| Memory | 1536 MB | 512 MB |
| Core Speed | 790 MHz | 750 MHz |
| Shader Speed | 1580 MHz | (N/A) MHz |
| Memory Speed | 1000 MHz | 900 MHz |
| Unified Shaders | 144 | 800(160x5) |
| Texture Mapping Units | 24 | 40 |
| Render Output Units | 24 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 256-bit |
| DirectX Version | DirectX 11 | DirectX 10.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 3.0 |
| Power (Max TDP) | 106 watts | 150 watts |
| Shader Model | 5.0 | 4.1 |
| Bandwidth | 96000 MB/sec | 115200 MB/sec |
| Texel Rate | 18960 Mtexels/sec | 30000 Mtexels/sec |
| Pixel Rate | 18960 Mpixels/sec | 12000 Mpixels/sec |
Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses 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 amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics 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 maximum number of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.
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