I understand that your system reboots every 5 seconds and you receive error code E1 and you wish to know the meaning.
The issue that you are describing is usually related to a power issue or a device not working properly. I recommend you to test your motherboard out of the chassis on a basic configuration and try to enter BIOS.
If you are not able to get in BIOS, you should start replacing parts to test with.
Can you confirm the board that you have DP67BG?
Have you seen the system working with an older processor?
Is your new processor in the compatibility list? Intel® Processors and Boards Compatibility Tool - Search Results Page ?