02-10-2014 06:54 PM
It depends. This PC is a configurable model so the power consumption can vary greatly depending on the equipment types that are configured this PC and the usage load. There is no simple answer and any speculation will rule out accuracy.
However, if you have this PC then use a wattage measuring device such as the one below.
HP e9280t, i7-960, 12GB, Vertex 3 120, ATI 4850
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Windows 7/8 UEFI/Legacy mode, MBR/GPT