 |
 |
|
|
|
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 memory. It features 768 SPUs as well as 64 Texture Address Units and 16 ROPs.Compare all that to the Radeon HD 7770, which comes with a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, 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 |
|
|
Memory Bandwidth
As far as performance goes, the GeForce GTX 650 Ti 2GB should in theory be a small bit superior to the Radeon HD 7770 in general. (explain)
| GeForce GTX 650 Ti 2GB |
|
86400 MB/sec |
| Radeon HD 7770 |
|
72000 MB/sec |
|
|
Texel Rate
The GeForce GTX 650 Ti 2GB will be quite a bit (more or less 48%) better at anisotropic filtering than the Radeon HD 7770. (explain)| GeForce GTX 650 Ti 2GB |
|
59392 Mtexels/sec |
| Radeon HD 7770 |
|
40000 Mtexels/sec |
|
|
Pixel Rate
If using high levels of AA is important to you, then the Radeon HD 7770 is a better choice, not by a very large margin though. (explain)| Radeon HD 7770 |
|
16000 Mpixels/sec |
| GeForce GTX 650 Ti 2GB |
|
14848 Mpixels/sec |
|
|
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 GTX 650 Ti 2GBAmazon.com
Other US-based stores
|
Radeon HD 7770Amazon.com
Other US-based stores
|
Specifications
| Model | GeForce GTX 650 Ti 2GB | Radeon HD 7770 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| 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 11.1 | 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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.
Comments
Be the first to leave a comment!