Hope everyone is doing well here. I have a Dell Studio XPS 7100: Windows 7 Ultimate x64 AMD Phenom(tm) II X6 1090T Processor (6 CPUs), ~3.2GHz 8GB of RAM (2GBX4) 1GB ATI Radeon HD 5670 460W PSU 1TB SATA 2 7200rpm HD It says the motherboard is Dell 0GK1K2 (can't find specs for this online): http://www.ascendtech.us/dell-gk1k2-studio-xps-7100-motherboard_i_mbdgk1k2xps7100.aspx I have yet to open up the tower and look inside myself, but there should be an extra SATA connection and one more 3.5" drive bay. I want to upgrade the RAM to the max (16GB across 4 4GB sticks or 2 8GB sticks or whatever it needs to be) and need to add a slave drive (looking at 2TB-3TB) as my master drive is near 80% full (not good). I need to know if these upgrades can be handled safely by the current power supply. I called Dell and was told: 1. Max RAM each slot can handle is 4GB or 8GB (got two different answers from two different people) 2. If I add a slave drive bigger than 1TB, there will be problems with the PSU I don't want to put too much in here and cause a problem with the PSU (won't that kill the computer entirely)? Questions: 1. So can I make these upgrades safely or not without also upgrading the current PSU? 2. Is there a way for me to check the insides of my computer to know what is exactly in there (using software)? 3. Is there a way for me to test to see if these upgrades will be safe? 4. SATA 3 is backwards compatible with SATA 2 right (so a SATA 3 drive will work on a SATA 2 connection)? 5. What RAM and HD's would you guys recommend? 6. Can Windows 7 Ultimate support a 3TB HD as a slave drive with no problems? I am always open to just buying an external HD and taking space off the master that way also. Thanks!