ask gan i5 2500K MSI Z68MA-ED55 G-Sklill RipjawsX 2X2GB (rencana tambah 2x2 lagi) WDC Blue 1TBx2 WDC Green 2TBx2 fan case 5x12cm, fan procey bawaan intel Muscle Power Yamadipati 500w rencana ane mau pake R9 285 / R9 280x...masih aman kah power supply ane? terus kan mobo ane masih PCI 2.0, apa ga ma