This is OEM mobo from HP, made for power saving purpose not for gaming. However, safest step is borrow your friend PSU & GC for testing first as Bonchi highlight previously....also for PSU mounting place size. As per your pic, you need PSU that have:

2 x PCIe 6 pin (for powerport & GC)
1 x ATX12V 4+4 pin (seperate type for 8-pin ATX12V) (for SATA power)
1 x ATX12V 4 pin (for CPU power)

You can ditch that 24-pin away...
Good luck.

This post has been edited by kherel77: Jul 27 2012, 11:00 AM

His mean is for detection & compatibility. But you need to fire-up the GC to check that...so need both testing at the same time. If confirm can run, then you can buy your new PSU & GC...