Hello. I have a question. I have a BFG power supply for my desktop that is rated at 800 Watts ATX 12V 2.2/ EPS 12V 2.91 [BFG model: BFGR800WPSU]. I have a APC Back-Ups power supply/battery backups that is rated at 450 Watts / 725 VA (the rating both for output power capacity & max. configurable power) [APC model: BE725BB]. Obviously, the desktops power supply cord is connected and drawing power from the power supply/battery backups for battery backup reasons. My 19 inch LCD monitor is also connected to this power supply/batter backups as well. My desktop computer has Intel Core 2 Quad processor, only 1 NVIDIA graphics card, 1 Creative X-Fi Sound Card, 6 other PCI cards installed, 2 DVD burner drives, 1 floppy drive, 5 hard drives, 5 internal fans + 1 CPU fan. Now this is my concern: Do I have issues here concerning my Watts? ...even serious issues? I am not trained and know very little about electricity, but the Watts of my power supply/battery backups is almost half that needed for the Watts for my desktop power supply. Just tonight I have discovered this possible issue. I have been using this BFG power supply for a long time now and have had it plugged into this battery backup system for a long time as well. To date, I have not had any issues. The computer has run just fine. I may be overreacting or I may be NOT! Please comment and state facts about my situation if I do indeed have an issue. Also, if you have any solutions to an issue, please help me! Thanks!