Look under "cpu support" for the msi board to be sure it will post with the first bios version. The 940 is a newer cpu, so some boards may require a flash before installation. For the power supply, get a 650-750 watt corsair, seasonic, antec, pc power and cooling, or enermax. None of these brands is low budget. Expect to spend about $75-110. Check newegg for rebates. The cpu doesn't need a high end ps, but the 4870 does.