3930k overclocking woes!

[agentdark45]

Hey 8-Pack, thanks for the informative x79 guide you posted however I am still stuck on getting my 3930k stable at anything over 4.2ghz!

I've followed nearly every 3930k guide on the net and still can't figure out why I get BSOD's when upping the clocks (even with 1.4v+ on vcore).

My setup:

Gigabyte X79 UD5 on the f13w bios (latest)
32 GB corsair vengance RAM running @ stock 1600mhz (timings and voltages stock too).
Corsair H110 cooler in push/pull.
1000w PSU

My system is ROCK stable at 4.2ghz running 1.25 vcore, however no matter what I do with PLL voltages, vcore e.t.c I always get "Clock Watchdog Timeout" BSOD's when running at 4.4ghz+ (using multipliers, not strap adjustments) in a matter of seconds using prime95.

RAM always stays at 1600mhz.

I've even got a fan blowing on the VRM's to make sure that temps aren't a problem.

Could you please guide me as what I'm doing wrong?

Many thanks

 

[agentdark45]

Thanks for all of the replies guys.

Unfortunately the VTT / IMC voltage bumps didn't help that much - I did manage to at least run a few prime95 runs at 4.5ghz (however only at 1.4v+ vcore. Lower voltage / higher frequency resulted in a CLOCK_WATCHDOG_TIMEOUT bsod.

I'm also running my ram at 1600mhz at stock timings (however I need all 32gb as I use this machine for 3D rendering).

I figure something odd must be going on here if I can run 4.2ghz at 1.225 vcore, but can't run 4.5ghz stable at 1.4vcore? Should I mess with the PLL over-voltage settings?