It is a known issue of Microsoft Vista because it cannot distinguish between ambiguous hard disks. You can refer to the article in the link(http://support.microsoft.com/kb/925481/en-us) for details & follow it's instructions below to see if they help.
1. Create one or more partitions on all the hard disks that are not initialized.
2. Restart the computer.
3. Install Windows Vista.

This model support AMD Athlon™ 64 X2 Dual Core/Athlon™ 64/Sempron AM2 processor. The CPU support table listed the CPUs that ECS have tested and qualified for use with this model.