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Radeon HD 4870 1GB vs Radeon HD 6670 (OEM)
Intro
The Radeon HD 4870 1GB features a core clock speed of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also makes use of a 256-bit memory bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.Compare all of that to the Radeon HD 6670 (OEM), which comes with clock speeds of 800 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 memory. It features 480 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) |
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63 Watts |
| Radeon HD 4870 1GB |
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150 Watts |
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Memory Bandwidth
The Radeon HD 4870 1GB should theoretically perform much faster than the Radeon HD 6670 (OEM) in general. (explain)
| Radeon HD 4870 1GB |
|
115200 MB/sec |
| Radeon HD 6670 (OEM) |
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64000 MB/sec |
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Texel Rate
The Radeon HD 4870 1GB is much (about 56%) better at texture filtering than the Radeon HD 6670 (OEM). (explain)| Radeon HD 4870 1GB |
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30000 Mtexels/sec |
| Radeon HD 6670 (OEM) |
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19200 Mtexels/sec |
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Pixel Rate
If running with high levels of AA is important to you, then the Radeon HD 4870 1GB is a better choice, by far. (explain)| Radeon HD 4870 1GB |
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12000 Mpixels/sec |
| Radeon HD 6670 (OEM) |
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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
Radeon HD 4870 1GBAmazon.com
Check prices at:
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Radeon HD 6670 (OEM)Amazon.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 | Radeon HD 4870 1GB | Radeon HD 6670 (OEM) |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Jun 25, 2008 | February 2011 |
| Code Name | RV770 XT | Turks |
| Memory | 1024 MB | 512 MB |
| Core Speed | 750 MHz | 800 MHz |
| Memory Speed | 3600 MHz | 4000 MHz |
| Power (Max TDP) | 150 watts | 63 watts |
| Bandwidth | 115200 MB/sec | 64000 MB/sec |
| Texel Rate | 30000 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 12000 Mpixels/sec | 6400 Mpixels/sec |
| Unified Shaders | 800(160x5) | 480 |
| Texture Mapping Units | 40 | 24 |
| Render Output Units | 16 | 8 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 956 million | 715 million |
| Bus | PCIe 2.0 x16 | PCIe 2.1 x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.
Radeon HD 4870 1GBAmazon.com
Check prices at:
|
Radeon HD 6670 (OEM)Amazon.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.
|
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