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My friend has a z77-d3h and he had 2 sticks of corsair vengeance 1600mhz. he upgraded to 2 more sticks,.for a total of 4 sticks. But now the computer will not boot or post. the computer powers on and restarts within 5 seconds without displaying anything on the screen. The CMOS has been cleared and the bios has been updated to no avail. the two new sticks work fine by themselves but all 4 have an issue.