 |
 |
|
|
|
GeForce GTX 660 Ti vs Radeon HD 7850
Intro
The GeForce GTX 660 Ti features a GPU core speed of 915 MHz, and the 2048 MB of GDDR5 RAM runs at 1500 MHz through a 192-bit bus. It also is made up of 1344 Stream Processors, 112 Texture Address Units, and 24 ROPs.Compare all of that to the Radeon HD 7850, which comes with core clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 memory. It features 1024 SPUs along with 64 TAUs and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7850 |
|
130 Watts |
| GeForce GTX 660 Ti |
|
150 Watts |
|
|
Memory Bandwidth
Theoretically speaking, the Radeon HD 7850 should perform just a bit faster than the GeForce GTX 660 Ti overall. (explain)
| Radeon HD 7850 |
|
153600 MB/sec |
| GeForce GTX 660 Ti |
|
144000 MB/sec |
|
|
Texel Rate
The GeForce GTX 660 Ti is quite a bit (about 86%) better at texture filtering than the Radeon HD 7850. (explain)| GeForce GTX 660 Ti |
|
102480 Mtexels/sec |
| Radeon HD 7850 |
|
55040 Mtexels/sec |
|
|
Pixel Rate
If running with lots of anti-aliasing is important to you, then the Radeon HD 7850 is a better choice, and very much so. (explain)| Radeon HD 7850 |
|
27520 Mpixels/sec |
| GeForce GTX 660 Ti |
|
21960 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 660 TiAmazon.com
Other US-based stores
|
Radeon HD 7850Amazon.com
Other US-based stores
|
Specifications
| Model | GeForce GTX 660 Ti | Radeon HD 7850 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | August 2012 | March 2012 |
| Code Name | GK104 | Pitcairn Pro |
| Fab Process | 28 nm | 28 nm |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Memory | 2048 MB | 2048 MB |
| Core Speed | 915 MHz | 860 MHz |
| Shader Speed | 915 MHz | (N/A) MHz |
| Memory Speed | 1500 MHz (6000 MHz effective) | 1200 MHz (4800 MHz effective) |
| Unified Shaders | 1344 | 1024 |
| Texture Mapping Units | 112 | 64 |
| Render Output Units | 24 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 256-bit |
| DirectX Version | DirectX 11.1 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.3 | OpenGL 4.2 |
| Power (Max TDP) | 150 watts | 130 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 144000 MB/sec | 153600 MB/sec |
| Texel Rate | 102480 Mtexels/sec | 55040 Mtexels/sec |
| Pixel Rate | 21960 Mpixels/sec | 27520 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it 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, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 per second.
Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.
Comments
3 Responses to “GeForce GTX 660 Ti vs Radeon HD 7850”