MSI DBS (Dual Bridge System) Technology supports dual PCI Express graphics card with PCI Express x16 and PCI Express x2 interface onboard. The PCI Express X2 slot onboard is an open-ended slot for ordinary PCI Express X1, X2 add-on card or PCI Express X16 graphics card population.
DBS technology offers expansion capability to support quad display with different model of PCI Express graphics cards. It can extend your desktop to 4 monitors.
The major advantage of PCI Express X2 slot as second graphics interface versus PCI legacy is 4 times higher bandwidth. And most important of all, the bandwidth of PCI Express X2 is point-to-point and exclusive for single add-on device. Bandwidth of PCI bus was shard by every PCI devices. More devices were installed, there are less bandwidth was left for sharing, but more interruptions.
| Graphics Card Interface | Total Bandwidth | Bidirectional Transfers? | Full Duplex Mode Transfers? | Max. Downstream Transfer Rate | Max. Upstream Transfer Rate |
| PCI Express x16 | 8.0GB/s | Yes | Yes | 4.0GB/s | 4.0GB/s |
| AGP 8x | 2.1GB/s | Yes | No | 2.1GB/s | 266MB/s |
| PCI Express x2 | 1GB/s | Yes | Yes | 512MB/s | 512MB/s |
| PCI (Legacy) | 266MB/s | Yes | No | 133MB/s | 133MB/s |
Based on benchmarks results on PCI Express X16 and PCI Express X2, there are only 3% drop on 3D Mark2003 and 15% on DOOM3. These facts indicate that PCI Express X2 is sufficient for moderate 3D Graphics and daily usage.
| 6600GT | 3D Mark 2003 | 3D Mark 2005 | DOOM3 |
| PCI Express X16 | 8253 | 3315 | 60 |
| PCI Express X2 | 8016 | 2720 | 52.1 |
If you are looking for quad-display for your PC system, you don’t have to suffer old PCI legacy interface. MSI DBS technology is the most appropriate solution for you.
You can find out more product information at http://www.msi.com.tw/program/products/
