SoftTH allows using three monitor "triplehead" with Direct3D 8 and 9 games without special hardware. You need three monitors attached to PCI Express video cards. Only one card does all the rendering work, so secondary card can be a low end card, only Direct3D support is required.
SoftTH works by rendering the whole scene on one display adapter, which then gets split into three parts to be displayed on each monitor. While it is technically possible to use it on a AGP/PCI card, only PCI Express has the required bandwidth to get good framerates.
Look for a diagram of it's basic operation
New! An 'official' for SoftTH
Compatibility and performance
While SoftTH can theoretically be compatible with any Direct3D 8 or Direct3D 9 game, some features used by games could not be yet suppoted or they can use special features which are incompatible with SoftTH. A common problem is also that the game cannot handle the aspect ratio, which results in a stretched image.
Examples of SoftTH compatibility with some games tested:
Working correctly:
- Live for Speed S2
- Operation Flashpoint
- Lock On Modern Air Combat
- Richard Burns Rally
* Needs forceHorizontalFOV set to 1 - Elder Scrolls 4 - Oblivion
- rFactor
- X3 Reunion
- GTR 2
- GT Legends
- Test Drive Unlimited
* Enable hooks and doScaleMouseCoordinates to fix cursor clipping - Armed Assault
- Trackmania series
- BMW M3 Challenge
- Nascar Racing 2003
- The Witcher
- Company of Heroes
- Call of Duty 2
- Call of Duty 4
- GTR Evolution
- Team Fortress 2
- Fallout 3
Not working:
- IL-2 Sturmovik
- Doesn't work (OpenGL game, with dx8wrapper sets incorrect videomode) - Microsoft Flight Simulator X
- Frame rendered only on left monitor, mouse not working correctly - careinfo111.blogspot.com
Tests above are run with the following system configuration:
- Intel Core 2 Duo E6600 overclocked to 3,4GHz
- Gigabyte X38-DQ6
- careinfo111.blogspot.com
- 2GB of memory
- GeForce 8800GTS 512MB PCI-e 2.0 (Rendering, middle monitor and right monitor)
- GeForce 8400GS PCI-e (Left monitor)
- Windows XP Pro SP2
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