 |
 |
Radeon HD 3870 X2 1GB vs Radeon HD 6670 (OEM)
Intro
The Radeon HD 3870 X2 1GB features a clock frequency of 825 MHz and a GDDR4 memory speed of 1126 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 16 Texture Address Units, and 16 ROPs.Compare those specs to the Radeon HD 6670 (OEM), which has core clock speeds of 800 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 RAM. It features 480 SPUs along with 24 TAUs and 8 ROPs.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
Performance-wise, the Radeon HD 3870 X2 1GB should in theory be much better than the Radeon HD 6670 (OEM) overall. (explain)
| Radeon HD 3870 X2 1GB |
|
144128 MB/sec |
| Radeon HD 6670 (OEM) |
|
64000 MB/sec |
|
|
Texel Rate
The Radeon HD 3870 X2 1GB should be quite a bit (more or less 38%) more effective at AF than the Radeon HD 6670 (OEM). (explain)| Radeon HD 3870 X2 1GB |
|
26400 Mtexels/sec |
| Radeon HD 6670 (OEM) |
|
19200 Mtexels/sec |
|
|
Pixel Rate
The Radeon HD 3870 X2 1GB will be much (approximately 313%) faster with regards to full screen anti-aliasing than the Radeon HD 6670 (OEM), and also will be capable of handling higher resolutions more effectively. (explain)| Radeon HD 3870 X2 1GB |
|
26400 Mpixels/sec |
| Radeon HD 6670 (OEM) |
|
6400 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.
One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.
Price Comparison
Radeon HD 3870 X2 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.
Specifications
| Model | Radeon HD 3870 X2 1GB | Radeon HD 6670 (OEM) |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Jan 28, 2008 | February 2011 |
| Code Name | R680 | Turks |
| Memory | 1024 MB (x2) | 512 MB |
| Core Speed | 825 MHz (x2) | 800 MHz |
| Memory Speed | 2252 MHz (x2) | 4000 MHz |
| Power (Max TDP) | (Unknown) watts | 63 watts |
| Bandwidth | 144128 MB/sec | 64000 MB/sec |
| Texel Rate | 26400 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 26400 Mpixels/sec | 6400 Mpixels/sec |
| Unified Shaders | 320(64x5) (x2) | 480 |
| Texture Mapping Units | 16 (x2) | 24 |
| Render Output Units | 16 (x2) | 8 |
| Bus Type | GDDR4 | GDDR5 |
| Bus Width | 256-bit (x2) | 128-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | (Unknown) million | 715 million |
| Bus | PCIe 2.0 x16/(internal PCIe 1.1 x16) | PCIe 2.1 x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.
Radeon HD 3870 X2 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.
|
Comments
Be the first to leave a comment!