Can Gigabyte PoweRock 390 power supply unit handle this rig?
-E5300 2.60Ghz O.C @ 3.5Ghz at 1.45Vcore
-2 x 2G DDR3 1333 Value Ram by Kingmax at 1.5VDimm
-Gigabyte GV-N220OC-1Gi GPU 786/1709/933 OC
-4 x 92 x 92 Fans
- 2 x Hard Disk 500GB 7200RPM
-2 x DVDRW Divice.
Your PSU will easily power either your or your nephew systems.
Your PSU has 24 amps (288 watts) on the rails. Your CPU will pull about 6 and no more than 7 amps. The GPU will pull about 4 or 5 amps depending on which model you have. That leaves more than enough power for the rest of the system.