Most N1996 boards came in cheap OEM cases with 250W-300W power supplies. If you add a Q6600 (95W TDP) and a dedicated GPU, upgrade to a reputable 400W-450W PSU (e.g., EVGA 450 BR).
The BIOS on the MSI N1996 is usually a custom or Award BIOS with limited overclocking options. Key BIOS traits: msi n1996 motherboard specifications