Hello i have an Intel Xeon e5420, motherboard Foxconn 2A8Ch and 4GB oh ram DDR3 SDRAM. I wanna know if my 300W psu can work with those specifications(The PSU has 1.9A The psu has 1.9A and on the box said he will need 300w psu and 2A). What about gaming..Will be ok? I have to upgrade the psu?