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Radeon HD 6670 (OEM) 1GB vs Radeon HD 7770
Intro
The Radeon HD 6670 (OEM) 1GB makes use of a 40 nm design. ATi has clocked the core speed at 800 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this specific card. It features 480 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.Compare that to the Radeon HD 7770, which has core clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) 1GB |
|
63 Watts |
| Radeon HD 7770 |
|
80 Watts |
|
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Memory Bandwidth
Theoretically speaking, the Radeon HD 7770 should perform just a bit faster than the Radeon HD 6670 (OEM) 1GB in general. (explain)
| Radeon HD 7770 |
|
72000 MB/sec |
| Radeon HD 6670 (OEM) 1GB |
|
64000 MB/sec |
|
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Texel Rate
The Radeon HD 7770 will be quite a bit (approximately 108%) more effective at anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)| Radeon HD 7770 |
|
40000 Mtexels/sec |
| Radeon HD 6670 (OEM) 1GB |
|
19200 Mtexels/sec |
|
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Pixel Rate
The Radeon HD 7770 will be a lot (more or less 150%) faster with regards to FSAA than the Radeon HD 6670 (OEM) 1GB, and will be capable of handling higher resolutions without slowing down too much. (explain)| Radeon HD 7770 |
|
16000 Mpixels/sec |
| Radeon HD 6670 (OEM) 1GB |
|
6400 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.
Radeon HD 6670 (OEM) 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
Radeon HD 7770Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
Specifications
| Model | Radeon HD 6670 (OEM) 1GB | Radeon HD 7770 |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | February 2011 | February 2012 |
| Code Name | Turks | Cape Verde XT |
| Fab Process | 40 nm | 28 nm |
| Bus | PCIe 2.1 x16 | PCIe 3.0 x16 |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 800 MHz | 1000 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 1000 MHz (4000 MHz effective) | 1125 MHz (4500 MHz effective) |
| Unified Shaders | 480 | 640 |
| Texture Mapping Units | 24 | 40 |
| Render Output Units | 8 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.2 |
| Power (Max TDP) | 63 watts | 80 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 64000 MB/sec | 72000 MB/sec |
| Texel Rate | 19200 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 6400 Mpixels/sec | 16000 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a 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 - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.
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