Power supply for DL360

Hi,

I am purchasing the following profile and need to know if I can use the 500W power supply or do I need to go to the 800W?

(1) Proliant DL360 (G 9) Rack Server/TV Xeon E5 (2620) 2.4 GHz 16 GB (No HDD) SAT                        

(1) 16GB Memory Module PC3L-10600 1333MHZ DDR3 Registered Dual Rank X4 CAS-9 (Low Power)        

(1) 300 GB 6G (10000 RPM) 2.5 Inch SAS Dual Port Enterprise HDD

Thank you!

Russ