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GeForce GTS 250 1GB vs Radeon HD 7770
Intro
The GeForce GTS 250 1GB features a core clock frequency of 738 MHz and a GDDR3 memory frequency of 1100 MHz. It also uses a 256-bit bus, and uses a 65/55 nm design. It is made up of 128 SPUs, 64 TAUs, and 16 ROPs.Compare all of that to the Radeon HD 7770, which comes with a clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7770 |
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80 Watts |
| GeForce GTS 250 1GB |
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145 Watts |
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Memory Bandwidth
Performance-wise, the Radeon HD 7770 should theoretically be a bit superior to the GeForce GTS 250 1GB in general. (explain)
| Radeon HD 7770 |
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72000 MB/sec |
| GeForce GTS 250 1GB |
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70400 MB/sec |
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Texel Rate
The GeForce GTS 250 1GB will be a little bit (more or less 18%) better at texture filtering than the Radeon HD 7770. (explain)| GeForce GTS 250 1GB |
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47232 Mtexels/sec |
| Radeon HD 7770 |
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40000 Mtexels/sec |
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Pixel Rate
If using lots of anti-aliasing is important to you, then the Radeon HD 7770 is superior to the GeForce GTS 250 1GB, and very much so. (explain)| Radeon HD 7770 |
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16000 Mpixels/sec |
| GeForce GTS 250 1GB |
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11808 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 250 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 7770Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GTS 250 1GB | Radeon HD 7770 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | March 3, 2009 | February 2012 |
| Code Name | G92a/b | Cape Verde XT |
| Fab Process | 65/55 nm | 28 nm |
| Bus | PCIe x16 2.0 | PCIe 3.0 x16 |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 738 MHz | 1000 MHz |
| Shader Speed | 1836 MHz | (N/A) MHz |
| Memory Speed | 1100 MHz | 1125 MHz |
| Unified Shaders | 128 | 640 |
| Texture Mapping Units | 64 | 40 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| DirectX Version | DirectX 10 | DirectX 11.1 |
| OpenGL Version | OpenGL 3.1 | OpenGL 4.2 |
| Power (Max TDP) | 145 watts | 80 watts |
| Shader Model | 4.0 | 5.0 |
| Bandwidth | 70400 MB/sec | 72000 MB/sec |
| Texel Rate | 47232 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 11808 Mpixels/sec | 16000 Mpixels/sec |
Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If 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, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling 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 graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends 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 max fill rate.
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