A:Answer The power supply that comes in this is only 350w. to be safe for future upgrade of hard drives, ssd's, memory, fans, sound cards, the recommendation is to upgrade the power supply. I purchase this pc on Saturday and just upgraded the power supply to an EVGA 600w 80 PLUS today, because I knew that within 1 week I would be swapping out ram for 16GB, and adding fans. I have already put in my 2 PNY 960 GB XLR8 SSD's from my laptop. now with the new upgraded psu, this system runs phenomenal.