 |
 |
Radeon HD 4850 X2 1GB vs Radeon HD 6670 (OEM)
Intro
The Radeon HD 4850 X2 1GB comes with a clock speed of 625 MHz and a GDDR3 memory speed of 993 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.Compare all of that to the Radeon HD 6670 (OEM), which features a clock frequency of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It features 480 SPUs, 24 TAUs, and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) |
|
63 Watts |
| Radeon HD 4850 X2 1GB |
|
250 Watts |
|
|
Memory Bandwidth
In theory, the Radeon HD 4850 X2 1GB is 99% quicker than the Radeon HD 6670 (OEM) overall, due to its greater data rate. (explain)
| Radeon HD 4850 X2 1GB |
|
127104 MB/sec |
| Radeon HD 6670 (OEM) |
|
64000 MB/sec |
|
|
Texel Rate
The Radeon HD 4850 X2 1GB will be a lot (about 160%) better at AF than the Radeon HD 6670 (OEM). (explain)| Radeon HD 4850 X2 1GB |
|
50000 Mtexels/sec |
| Radeon HD 6670 (OEM) |
|
19200 Mtexels/sec |
|
|
Pixel Rate
If using a high screen resolution is important to you, then the Radeon HD 4850 X2 1GB is a better choice, by far. (explain)| Radeon HD 4850 X2 1GB |
|
20000 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 4850 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 4850 X2 1GB | Radeon HD 6670 (OEM) |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Nov 7, 2008 | February 2011 |
| Code Name | R700 | Turks |
| Memory | 1024 MB (x2) | 512 MB |
| Core Speed | 625 MHz (x2) | 800 MHz |
| Memory Speed | 1986 MHz (x2) | 4000 MHz |
| Power (Max TDP) | 250 watts | 63 watts |
| Bandwidth | 127104 MB/sec | 64000 MB/sec |
| Texel Rate | 50000 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 20000 Mpixels/sec | 6400 Mpixels/sec |
| Unified Shaders | 800(160x5) (x2) | 480 |
| Texture Mapping Units | 40 (x2) | 24 |
| Render Output Units | 16 (x2) | 8 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 256-bit (x2) | 128-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 956 million | 715 million |
| Bus | PCIe 2.0 x16 (PCIe bridge) | 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 maximum amount of information (counted in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen 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 of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.
Radeon HD 4850 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!