You should be able to run Dangerous Waters on both
Here are the system requirements:
Quote:
- Minimum: Windows 98SE/ME/2000/XP, 550Mhz CPU, 128 MB RAM, D3D Video Card with 32MB RAM (DirectX 9.0b drivers), DX9 Sound Card, 590MB hard drive space, Internet or LAN connection for multiplayer
Recommended: 1GHz+ CPU, 256 MB RAM, D3D Video Card with 64MB RAM (with DirectX 9.0b compatible drivers), 1GB hard-drive space
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As for Silent Hunter 3
Your laptop should be able to run it, but your desktop would chug along.
Here are the system requirements:
Quote:
- OS: Windows 2000 / XP
- Processor: Pentium® III 1.4 GHz or AMD Athlon™ 1.4 GHz (Pentium 4 2.0 GHz or AMD Athlon 2.0 GHz recommended)
- Memory: 512 MB
- Graphics: 64 MB (128 MB video card recommended)(see supported list*)
- DirectX Version: DirectX 9.0
- Sound: Direct X 9.0 compliant PCI card
- Hard Drive: 1.5 GB
- *Supported Video Cards at Time of Release Nvidia® GeForce™ 3/4/FX series (GeForce 4 MX NOT supported)ATI® Radeon® 8500/9000 families or newer
Laptop versions of these chipsets may work but are not supported. These chipsets are currently the only ones that will run this game.
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As you stated, the graphics card in your laptop is the biggest set back.
The other issues is I'm uncertain on whether or not both games will work on Windows 7. Although by running them as admin, running them under XP and or adding them to the list of exceptions in your DEP you shouldn't have any problems.