HI all.  I just completed a new build and starting to OC with little success or stability, so I need some help here.

 

The rig is:

 

4670K w/ Coolermaster Evo/ IC Diamond 7

Asrock Extreme4 Z87

Corsair Ballistix Sport 8gb 1600  9/9/9/24 1.5v

Corsair TX-850 38a on single 12v rail

MSI GTX-760 2gb

Windows 7 Pro

 

Heat doesn't seem to be the issue.  The best (somewhat stable) OC results to date are 4.2 on 1.2 vcore with temps right around 70C using either Prime95 or Intel Extrme Tester.  I have tried fixed and adaptive voltages with/wo offsets. Lowering the CPU Cache to 35, Raising/lowering Vcore.  Lowering ram speed etc.   It just seems anything from 4.1 up is unstable no matter what.  Dog chip?  I am testing my ram now for errors.  I have another rig (specs under user name) with xp64 and that just feels faster than this box - strange.  When I found the OC voltage sweet spot on that e8500, you could sense it immediately. 

 

I have read just about everything from G00gle on OC'ing a 4670K with this board, including this 3 step guide to Haswell.://www.overclockers.com/3step-guide-to-overclock-intel-haswell .  On my initial test @ 4.6 I booted half way into to 7, so it seemed I had something better going with this chip.

 

Any help would be appreciated, especially by someone familiar with this board.  Thanks.

i'll throw my $0.02, and take them with a grain of salt; those tests don't tell much, the real test is what you use the rig for. go for higher volts; i run 4770k @4.5 GHz and Vcore 1.5V, one week stable not yet trust it, tho. 

 

i personally don't care for the RAM volts other than higher than 1.7 but my Asus takes care of that as well. Refer videos in youtube for OC, usually you don't need to touch those but...play as much as you want

 

Enjoy the toaster!

With proper settings this chip would run 4.4-4.5 @1.27v not a good one , but dont try 1.5v on aircooling.

No need for lowering cash and memspeed with that clock and 1600mhz mems on Haswell, only when going +2600mhz some chips do only 2400mhz.

 

Air up to 1.3v water or DH14 1.4v if you go subzero "SS" 24/7 1.5V if you go higher you probaly get throttling during load.

 

 

1.5V

 

Should have said 1.35V and still trying lower at 1.32V now

Well, it seems that I have a very  temperamental  Haswell chip.  After consulting Nick's OC bible, I have made some progress, but still having a hard time getting stability a 4.2, even with 1.26 vcore.  Temps are hanging in there....barely.  It seems the consensus is that Haswell is a tough overclcocker unless you get a decent chip.

 

@beltrix,  throwing more voltage at Haswell isn't always the answer (like we used to do with other chips).  There's more to it because of newer internal voltage regulation.  Besides, I've already tried that route.  I do appreciate you investing your first post here after 4 1/2 years to try and help, thanks! and good luck with your OC.

 

Now to decide if I want to drive 180 miles RT to exchange this for another one and play the lottery again, or settle for what I have??.... :Whistle:   Wondering if I can get any worse of a chip.

It's not always about the CPU don't forget. The motherboard comes into it too. Some MB's are better overclockers than others. In addition, are you cool enough in regard to motherboard temps? Are the VRM's cool enough for your overclock?

 

 

@beltrix,  throwing more voltage at Haswell isn't always the answer (like we used to do with other chips).  There's more to it because of newer internal voltage regulation.  Besides, I've already tried that route.  I do appreciate you investing your first post here after 4 1/2 years to try and help, thanks! and good luck with your OC.

 

You maybe right on that one but, it has been yet my only approach and seems to work, it responds immediately and got it stable at 1.35V.  Keep it up and consider lottery again. 

 

Best of luck