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GeForce GTX 650 Ti 2GB vs Radeon HD 7770
Intro
The GeForce GTX 650 Ti 2GB features clock speeds of 928 MHz on the GPU, and 1350 MHz on the 2048 MB of GDDR5 memory. It features 768 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.Compare that to the Radeon HD 7770, which features a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7770 |
|
80 Watts |
| GeForce GTX 650 Ti 2GB |
|
110 Watts |
|
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Memory Bandwidth
In theory, the GeForce GTX 650 Ti 2GB will be 20% faster than the Radeon HD 7770 overall, due to its greater data rate. (explain)
| GeForce GTX 650 Ti 2GB |
|
86400 MB/sec |
| Radeon HD 7770 |
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72000 MB/sec |
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Texel Rate
The GeForce GTX 650 Ti 2GB will be much (about 48%) more effective at anisotropic filtering than the Radeon HD 7770. (explain)| GeForce GTX 650 Ti 2GB |
|
59392 Mtexels/sec |
| Radeon HD 7770 |
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40000 Mtexels/sec |
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Pixel Rate
If running with high levels of AA is important to you, then the Radeon HD 7770 is superior to the GeForce GTX 650 Ti 2GB, but it probably won't make a huge difference. (explain)| Radeon HD 7770 |
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16000 Mpixels/sec |
| GeForce GTX 650 Ti 2GB |
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14848 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 GTX 650 Ti 2GB
Radeon HD 7770
Specifications
| Model | GeForce GTX 650 Ti 2GB | Radeon HD 7770 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | October 2012 | February 2012 |
| Code Name | GK106 | Cape Verde XT |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 928 MHz | 1000 MHz |
| Memory Speed | 5400 MHz | 4500 MHz |
| Power (Max TDP) | 110 watts | 80 watts |
| Bandwidth | 86400 MB/sec | 72000 MB/sec |
| Texel Rate | 59392 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 14848 Mpixels/sec | 16000 Mpixels/sec |
| Unified Shaders | 768 | 640 |
| Texture Mapping Units | 64 | 40 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 28 nm | 28 nm |
| Transistors | 2540 million | 1500 million |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11.0 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.3 | OpenGL 4.2 |
Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should 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 higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.
GeForce GTX 650 Ti 2GB
Radeon HD 7770
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