Just bought a HP 6300 PRO SFF with an i5-3470, 8GB RAM, and 500GB HD shipped on eBay. I installed Windows 2012 R2 and added a 120GB SSD. It pulls 25-30 watts with 3 camera's ( 2 x 3MP, 1 x 4MP) all at 10fps, H.264 encoding enabled, and without Direct to Disc(demo version). It's for my...