I would make sure your friend has the latest BIOS available.
Make sure everything is plugged into the Mobo? (no forgotten cables? sounds silly but it happens).
Maybe re-install the processor again?
Try another Video card? Make sure GC has power connection to PSU if needed?
Make sure no RAM problems?
Cloud (noun, singular): A dynamic arrangement of multiple potential single points of failure, with a user at one end and their data at the other.
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