HP Pavilion HPE h8z customizable Desktop PC • Genuine Windows 7 Home Premium [64-bit] • AMD FX-8150 eight-core processor [3.6GHz, 8MB L2/8MB L3 Cache] • FREE UPGRADE to 8GB DDR3-1333MHz SDRAM [2 DIMMs] from 6GB • 1TB 7200 rpm SATA hard drive • Microsoft(R) Office Starter: reduced-functionality Word & Excel w/ ads. No PowerPoint or Outlook • Norton Internet Security(TM) 2012 - 15 month • 1GB DDR3 Radeon HD 6570 [DVI, HDMI. VGA adapter] • 300W Power supply • FREE UPGRADE to Blu-Ray player • Wireless-N LAN card (1x1) • 15-in-1 memory card reader, 2 USB 2.0 (front), audio, 2 USB (top rear-facing) • No TV Tuner • Beats Audio (tm) -- integrated studio quality sound • Premium HP keyboard and optical mouse I just customized this pc and bought it and it said that a Power Supply was availible for $100 extra but it didnt make me choose it. Will my PC be ok? What can this cause?