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GeForce GTX 650 Ti 2GB vs Radeon HD 7770
Intro
The GeForce GTX 650 Ti 2GB comes with core clock speeds of 928 MHz on the GPU, and 1350 MHz on the 2048 MB of GDDR5 RAM. It features 768 SPUs along with 64 Texture Address Units and 16 ROPs.Compare those specifications to the Radeon HD 7770, which uses a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM works at a frequency of 1125 MHz on this particular model. It features 640 SPUs as well as 40 TAUs and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7770 |
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80 Watts |
| GeForce GTX 650 Ti 2GB |
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110 Watts |
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Memory Bandwidth
The GeForce GTX 650 Ti 2GB should in theory be a little bit faster than the Radeon HD 7770 overall. (explain)
| GeForce GTX 650 Ti 2GB |
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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 is a lot (more or less 48%) faster with regards to AF than the Radeon HD 7770. (explain)| GeForce GTX 650 Ti 2GB |
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59392 Mtexels/sec |
| Radeon HD 7770 |
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40000 Mtexels/sec |
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Pixel Rate
The Radeon HD 7770 should be just a bit (approximately 8%) faster with regards to AA than the GeForce GTX 650 Ti 2GB, and able to handle higher screen resolutions more effectively. (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 2GBAmazon.com
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Radeon HD 7770Amazon.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 GTX 650 Ti 2GB | Radeon HD 7770 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | October 2012 | February 2012 |
| Code Name | GK106 | Cape Verde XT |
| Fab Process | 28 nm | 28 nm |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 928 MHz | 1000 MHz |
| Shader Speed | 928 MHz | (N/A) MHz |
| Memory Speed | 1350 MHz (5400 MHz effective) | 1125 MHz (4500 MHz effective) |
| Unified Shaders | 768 | 640 |
| Texture Mapping Units | 64 | 40 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| DirectX Version | DirectX 11.0 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.3 | OpenGL 4.2 |
| Power (Max TDP) | 110 watts | 80 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 86400 MB/sec | 72000 MB/sec |
| Texel Rate | 59392 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 14848 Mpixels/sec | 16000 Mpixels/sec |
Memory Bandwidth: Bandwidth is the largest amount of data (in units of MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs 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 output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.
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