RAM and Booting Issue
Hello, my friend has an issue with her computer. She switched out the CPU, Motherboard and memory sticks. However, the motherboard will only boot with one ram stick, not two. The RAM sticks are model F3-1866C9D-8GAB, the motherboard is an ASUS Maximus V EXTREME LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 Extended ATX Intel Motherboard, and the CPU is a Intel Core i7-3770K Ivy Bridge 3.5GHz (3.9GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I73770K. It's not the RAM, that much we are aware of, and all of them are compatible with each other. I wonder if it could be the power supply, though I don't know the exact wattage. What would be the recommended wattage of usage? Thank you kindly!