I am having the exact same issue.. Still reading and tweaking.....
From what I have heard is that this board will not OC properly, suggested boards are either the p9x79 Pro or the Rampage Iv.
I have seen these issues in multiple forums.............
not just here...
I have ordered the Rampage IV also using the 3930k CPU
I finally was able to get my P9X79 Deluxe Board to over clock the 3930 processor
I have been hearing on countless occasions and forums that users of the ASUS Deluxe P9X79 main board will not hold the settings when over clocking. The quirk is this, Each setting you have to manually enter a number figure in YOU MUST PRESS ENTER AFTERWARDS!!!
Most boards I have worked with you just type in the values and arrow down and all is well. Well not with this board. I got it to overclock stable on the ASUS P9X79 Deluxe board with the Intel 3930k CPU at a stable 4.8 Ghz
Here are the following settings I used
1. Open up the Advanced BIOS settings
2. Go to AI Tweaker
3. Set your AI Over Clock Tuner to = Manual
4. Set your BCLK Frequency = 100.000
5. CPU Strap leave at Auto
6. Clock Gen Full Reset leave Enabled
7. Turbo Ratio set to = By All Cores
8. By All Cores (Can Adjust in OS) Set to = 48
9. clock Gen Filter Enabled
10. Memory Frequency = Set to what ever speed your memory is ie: PC1600 set to 1600 ie: PC2033 Set to 2033 and so on
11. EPU Power Saving Mode set to Disable
12. Go to CPU Performance Settings (Its towards the top of the screen) Set it to 48
13. CPU VCORE Voltage = Manual
14. CPU VCRE Manual Voltage set to = 1.450
15. CPU VCCSA Voltage set to Manual Mode
16. CPU VCCSA Manual Voltage set to = 1.265
17. DRAM Voltage (CHA, CHB) set to 1.645
18. DRAM Voltage (CHC, CHD) set to 1.645
19. CPU PLL Voltage Set to: 1.88125
20. VTCPU Voltage set to 1.11250
21. PCH 1.1v Voltage set to 1.11250
22. PCH 1.5v Voltage set to 1.55000
23. VTT DDR Voltage CHA-CHB Leave at Auto
24. VTT DDR Voltage CHC-CHD Leave at Auto
With these settings I am running stable at 117F Which is not too bad. I finally figured out the Enter after each setting by looking at someone elses numbers and they were a different color and I am going Hmmmm
somthing aint rite here, that is when I set a value and pressed ENTER and it turned the same color as his and I said I got ya now. and it did work.