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GeForce GT 640 DDR3 vs Radeon HD 6670 (OEM) 1GB
Intro
The GeForce GT 640 DDR3 has a GPU core clock speed of 900 MHz, and the 2048 MB of DDR3 RAM runs at 1782 MHz through a 128-bit bus. It also is made up of 384 SPUs, 32 TAUs, and 16 Raster Operation Units.Compare those specs to the Radeon HD 6670 (OEM) 1GB, which has core clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 480 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) 1GB |
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63 Watts |
| GeForce GT 640 DDR3 |
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65 Watts |
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Memory Bandwidth
The Radeon HD 6670 (OEM) 1GB should in theory perform a little bit faster than the GeForce GT 640 DDR3 overall. (explain)
| Radeon HD 6670 (OEM) 1GB |
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64000 MB/sec |
| GeForce GT 640 DDR3 |
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57024 MB/sec |
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Texel Rate
The GeForce GT 640 DDR3 should be a lot (more or less 50%) better at AF than the Radeon HD 6670 (OEM) 1GB. (explain)| GeForce GT 640 DDR3 |
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28800 Mtexels/sec |
| Radeon HD 6670 (OEM) 1GB |
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19200 Mtexels/sec |
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Pixel Rate
If running with a high resolution is important to you, then the GeForce GT 640 DDR3 is the winner, by a large margin. (explain)| GeForce GT 640 DDR3 |
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14400 Mpixels/sec |
| Radeon HD 6670 (OEM) 1GB |
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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
GeForce GT 640 DDR3Amazon.com
Check prices at:
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Radeon HD 6670 (OEM) 1GBAmazon.com
Check prices at:
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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 GT 640 DDR3 | Radeon HD 6670 (OEM) 1GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | June 2012 | February 2011 |
| Code Name | GK107 | Turks |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 900 MHz | 800 MHz |
| Memory Speed | 3564 MHz | 4000 MHz |
| Power (Max TDP) | 65 watts | 63 watts |
| Bandwidth | 57024 MB/sec | 64000 MB/sec |
| Texel Rate | 28800 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 14400 Mpixels/sec | 6400 Mpixels/sec |
| Unified Shaders | 384 | 480 |
| Texture Mapping Units | 32 | 24 |
| Render Output Units | 16 | 8 |
| Bus Type | DDR3 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 28 nm | 40 nm |
| Transistors | 1300 million | 715 million |
| Bus | PCIe 3.0 x16 | PCIe 2.1 x16 |
| DirectX Version | DirectX 11.0 | DirectX 11 |
| OpenGL Version | OpenGL 4.2 | OpenGL 4.1 |
Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.
GeForce GT 640 DDR3Amazon.com
Check prices at:
|
Radeon HD 6670 (OEM) 1GBAmazon.com
Check prices at:
|
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.
|
Comments
2 Responses to “GeForce GT 640 DDR3 vs Radeon HD 6670 (OEM) 1GB”Is the memory for GT 640 as 1782MHz correct? I think the base memory speed is 891Mhz and the effective memory speed is 1782.
well despite these results hd6670 performs well over all in games etc