Not that I'm doubting you, but how can that be? My dual E5-2670 system's max consumption from the wall is like 385W running Prime95 (blend) with 1 SSD, 2 7200RPM HDDs, 64gB of RAM (8x8gB), a low end PCIe graphics card (GeForce GT720). A decent 500W supply should have no problems running it.Not sure if anyone brought up this before, but just want to let everyone who is interested in converting a Dell T5600 to a dual E5-2670 workstation know that the 635W power supply comes with T5600 single cpu workstation is not enough to power dual E5-2670. You will have to have a 825w power supply. Some 2x quad core T5600 also equipped with the 635w PSU so be careful. The 825W power supply alone is about $300.00 on eBay. T5600 won't take a generic PSU due to its special design.