Please do not create additional threads for the same issue, I've now merged your two threads together.
Stop 0x124s are hardware related and there isn't much advice anyone can give you other than testing every possible component until you identify the issue. In fact, the issue can sometimes be due to the motherboard itself.
Ensure that you have the latest BIOS and firmware updates; check the motherboard support page
Remove any over/underclocking and ensure that your BIOS settings are set to their defaults
Remove any "system optimisation" software including motherboard support utilities
Swap out components if possible e.g. the graphics card
Ensure that everything is connected firmly and securely
Use different SATA cables if possible or different PCIe slots
Remove any external peripherals apart from the mouse and keyboard
Check that the PSU is providing optimal power and has suitable wattage for the hardware you have connected
Run with minimal hardware such as one hard disk and one RAM stick; swap around RAM sticks if the issue persists e.g. use different DIMM slots and different sticks one at a time