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4.0ghz VS 4.5ghz

Currently building a rig with a 2500K that won't go past 4.4Ghz without insane volts, 1.38v LLC almost max for 4.5Ghz stability but seems to be priming away atm at 4.4Ghz 1.345v. Not the best board, Asrock P67pro3 but a 2600k i have here does 4.8Ghz easily on it at 1.38v LLC level 3 (lower is higher on this board).
Funny you mention 45x, the chip seems a bit more stable and can prime at 4500Mhz with 1.365v when clocked to 102.3x44 but it eventually flakes out with failed test after 2-3hrs, however same vcore with 45x100 fails with BSOD 124 at that volts within half hour. Tried PLL overvoltage etc.. no luck.
 
Its got good cooling with a Noctua, but i'm rather shy for 1.4v+ on 32nm, could be me being conservative and nothing really to worry about but who knows :)? Have tried as far as 1.4v bang on with PLL and 4.6Ghz, Windows would not even load. Now the funny thing is, seems with a Vertex 2E Windows will load but prime will eventually crash, with the Agility 3 it would hang on the boot screen, tried PCH volts incase it was possibly a SATA 3 issue but no change, its a B3 revision anyhow so should be fine, however Asrock haven't updated the bios in a long time and i wonder if the Agility 3 might be a bit finicky with an older rom.
 
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I have the OCZ Agility 3. just hangs after post. I gave up! I deleted windows off my old boot HDD so cant try anything else now. DOH!
 
I think it depends on the MB. My Asus P*67 Deluxe (cost more the my 2500k) would only do 4.4 When the sata 3 ports died I got a Asrock Fatal1ty B3 rev for £40.00 and it would do 4.8 Via the oc in the bios. I have had it running at 4.6 for months. I still have to return the Asus....
 
I run mine at 4.4 24/7 at 1.27V in the bios. seems fine and im sure if i put it at 1.3 it could get 4.6 most likely. Any higher and voltage would have to be upped.
 
Mine also was a bad overclocker, I'm at 4.4ghz stable at about 1.33v I think, I'll have to check. I've had terrible luck with cpu's, not had a decent chip since an E6600.

:EDIT:

Just checked and it's at 1.95v, so I guess that isn't too bad.
 
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MOOGLEYS said:
A 1.1ghz overclock is bad ? Mine is 4.5ghz with 1.35V and I thought that was quite good...
Click to expand...

I always considered 1.3v to be the norm for 4.5ghz and I don't really consider a 1.1ghz overclock to be anything special for sandy bridge. If your chip can't reach 4.4ghz then you are very unlucky. I'd hope to get 4.7ghz on 1.35v but i've never tried going over 4.4ghz on my cpu just because you don't need it.
 
Yeah,

I guess my main problem is that my MOBO also can get stuck into random boot loops if it doesn't like the BIOS settings (Gigabyte) - really never going to get another one again.

The temps are very low @4.0 1.3v, but it seems the second i put the multiplier up, or increases the voltage I get hit with a boot lock, which involves resetting the bios, then redoing all of my overclock from scratch (which took ages to get at 4ghz in the first place).

Thought many different problems with this build I've started to adapt the approach of (if it aint broke, don't fix it).

Had massive BSOD problems with my agility 3 at first also - along with 1 DOA graphics card - a broken Naga mouse & the generally dodgy mobo.

I wudn't mind, but I've done many builds before - this one almost everything has gone wrong in one way or another.
 
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