I have a dual X5670 system movieman helped me get together. Just a cruncher. Last month or so kept getting random shut downs. Super micro board logs indicated power and memory. Changed both. Was in a case that housed 6 disks using win7 pro. Decided to remove everything except 1 ssd drive and cd drive and installed ubuntu. I disabled everything in the bios and started enabling things one at a time to try find the issue. Ran fine with no hyperthreading and no turbo boost. Turned on hyper threading and ran a full day without issue. Turned on turbo boost and it died within an hour. Is it chip or motherboard? Its crunching fine right now with hyperthreading and no turbo boost. Crunching 21 out of 24 threads now. Appreciate any help.