Hi Dave, I wouldn't worry too much about the SLI/Crossfire. You can always get a high-performance video card. As far as a power supply, I would go with at least 700W or 750W. I always go bigger because I am planning for future use. It looks to me with that much hardware going you will also need a couple of fans. I would think the bigger the better in order to handle future requirements. Greg B. Email: gbobo@woh.rr.com -----Original Message----- From: Blind-sysadmins [mailto:blind-sysadmins-bounces@lists.hodgsonfamily.org] On Behalf Of David Mehler Sent: Monday, December 03, 2012 2:01 PM To: blind-sysadmins Subject: [Blind-sysadmins] determing pc power needs? Hello, This one is for PC builders. I've been gathering parts mostly in the last month for a new PC. Currently I have a Gigabyte 970 USB 3 motherboard, 32 GB of ddr3 1866 ram, and an 8 core processor that part alone I know takes 125W of power. Ok, the power supply will need to be an ATX12V supply I've found two on newegg I like one for 500W the other for 530W both around the same price. My problem is determining my current power usage needs, currently I'm guessing, and future needs. This box will eventually have all six SATA3 ports used, one CD/DVD burner, one SSD drive, and four 7200 RPM SATA3 drives 1 TB or greater. Opinions on power? Also, SLI and Crossfire ready do I need to worry about those? Thanks. Dave. _______________________________________________ Blind-sysadmins mailing list Blind-sysadmins@lists.hodgsonfamily.org http://lists.hodgsonfamily.org/listinfo/blind-sysadmins