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GeForce 8800 GTS (G80) 320MB vs Radeon HD 4850 512MB
Intro
The GeForce 8800 GTS (G80) 320MB comes with a core clock speed of 513 MHz and a GDDR3 memory frequency of 792 MHz. It also uses a 320-bit memory bus, and makes use of a 90 nm design. It is comprised of 96 SPUs, 48 TAUs, and 20 ROPs.Compare those specifications to the Radeon HD 4850 512MB, which comes with a clock frequency of 625 MHz and a GDDR3 memory speed of 993 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4850 512MB |
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110 Watts |
| GeForce 8800 GTS (G80) 320MB |
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143 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 4850 512MB should perform a small bit faster than the GeForce 8800 GTS (G80) 320MB overall. (explain)
| Radeon HD 4850 512MB |
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63552 MB/sec |
| GeForce 8800 GTS (G80) 320MB |
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63360 MB/sec |
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Texel Rate
The Radeon HD 4850 512MB will be just a bit (approximately 2%) better at texture filtering than the GeForce 8800 GTS (G80) 320MB. (explain)| Radeon HD 4850 512MB |
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25000 Mtexels/sec |
| GeForce 8800 GTS (G80) 320MB |
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24624 Mtexels/sec |
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Pixel Rate
The GeForce 8800 GTS (G80) 320MB is a small bit (more or less 3%) faster with regards to anti-aliasing than the Radeon HD 4850 512MB, and will be able to handle higher screen resolutions better. (explain)| GeForce 8800 GTS (G80) 320MB |
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10260 Mpixels/sec |
| Radeon HD 4850 512MB |
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10000 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 8800 GTS (G80) 320MBAmazon.com
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Radeon HD 4850 512MBAmazon.com
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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
Specifications
| Model | GeForce 8800 GTS (G80) 320MB | Radeon HD 4850 512MB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | Feb 2007 | Jun 25, 2008 |
| Code Name | G80 | RV770 PRO |
| Memory | 320 MB | 512 MB |
| Core Speed | 513 MHz | 625 MHz |
| Memory Speed | 1584 MHz | 1986 MHz |
| Power (Max TDP) | 143 watts | 110 watts |
| Bandwidth | 63360 MB/sec | 63552 MB/sec |
| Texel Rate | 24624 Mtexels/sec | 25000 Mtexels/sec |
| Pixel Rate | 10260 Mpixels/sec | 10000 Mpixels/sec |
| Unified Shaders | 96 | 800(160x5) |
| Texture Mapping Units | 48 | 40 |
| Render Output Units | 20 | 16 |
| Bus Type | GDDR3 | GDDR3 |
| Bus Width | 320-bit | 256-bit |
| Fab Process | 90 nm | 55 nm |
| Transistors | 681 million | 956 million |
| Bus | PCIe x16 | PCIe 2.0 x16 |
| DirectX Version | DirectX 10 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card could 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 colour ROPs by the the core 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.
GeForce 8800 GTS (G80) 320MBAmazon.com
Check prices at:
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Radeon HD 4850 512MBAmazon.com
Check prices at:
|
Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
|
Comments
One Response to “GeForce 8800 GTS (G80) 320MB vs Radeon HD 4850 512MB”I like how all of your tests are done in the highest possible resolution. Because the lower physical memory of the 8800 gts couldn't possibly bottleneck it at those resolutions. The results on a lower resolution where the cards are more equally matched would be better suited.