Novice overclocker needs advice - i5 2500k ASRock Z68 PRO3

gp3000000

gp3000000

gp3000000

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Hi, I need some advice.

I'm trying to overclock my i5 2500k using the UEFI BIOS on the ASRock Z68 PRO3.

I've got to 3.8GHz so far, but the problem I'm having is the CPU Core Voltage, when I set it to Fixed Mode and a value, say 1.200, it never changes to that value, it's always well under. Like 1.144V.

When I change it to 1.240, it changes to 1.184V.

Any ideas? Also, should I be using offset mode instead and what is the difference?

Thanks in advance.
 
Right, so I tried offset mode, at 4.1GHz with a +0.005 and it worked fine, but the temps were a bit hot. (60ish)

Then I tried 4.3GHz with a - 0.020 and it booted fine, temps were 50ish. I rebooted, and it now won't boot. The first line come up, then nothing.

So I cleared the CMOS using the jumper, now all that comes up is the ASRock splash screen (so clearing the CMOS must have worked) but nothing else happens. Any ideas?
 
dude i have just got the asrock fatal1ty board and im having a mare oc'ing my 2600k.

you need to go to advanced cpu settings and disable:-
c1e
c3
c6
c state support
cpu thermal throttling

then go to oc tweaker and disable:-
spread spectrum

and then enable:-
intel speedstep technology
cpu ratio setting
internal pll overvolting
turbo boost power limit - short to 180 - long to 140
cpu core volt (you choose volts)
cpu llc to lvl 2 as lvl tends to overvolt
dram volts (you choose)
pch (leave alone)
cpu pll volts you can lower to 1.709 (prevent heat)

dram settings (your choice)

i hope that helps, let me know what you find as im interested :)
 
Well I solved the non-starting problem, it was to do with an old usb 1 hub I had to use to extend the length of both keyboard and mouse. Must've just been a coincidence it happened when overclocking, it scared the *&?* out of me

So I kept creeping up the multiplier till I got to 4.4GHz

I tried your suggested settings and suddenly before I know it I have a VCORE of 1.38ish?

5 minutes ago it was 4.4GHz stable at 1.29ish
 
Oh, and also it kept doing the 3 times fail to boot then revert to last know good settings thing after I applied those settings.

Thanks for the tip about the C1E C3 and C6, I kept wondering why it was throttling down to 1500MHz at times!

EDIT: Hit a brick wall now at 4.5GHz. Doesn't matter how much I increase VCORE using offset , 4.6GHz just keeps BSODing me.

Gonna make sure it's stable at 4.5GHz now. 1.312V, if you're interested. Temps never go above 60 on 100% load.
 
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im just finishing off some data transfering then im gonna start my clocking againg

i dont think these boards are the best for overclocking :/

it would be nice to hear what others are doing with these boards?
 
So far this morning, experimenting with LLC Level 2 (previously I have been using Level 5)-

4.2GHz, 1.304Vcore, Offset Mode set to -0.060, temps @ 69C running LinX (20 passes stable)

Wasn't happy with the temperature at all... so...

4.2GHz, 1.280Vcore, Offset set to -0.080, temps @ 67C LinX 20 pass stable

Gonna buy a faster fan for my watercooling kit (closed loop) and re-seat it using the springs I forgot (oops) and better thermal paste (I used whatever was on there) as no way am I happy with even 67C for more than a few minutes

EDIT: Now 4.2GHz, 1.264Vcore, Offset set to -0.100, temps @ 66C LinX 20 pass stable
 
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Oh ok, I just get worried when I see temps of 70deg!

Should add I stopped using LinX as everything kept passing but Prime 95 caused it to fail till I upped the Vcore again, now using Prime95
 
prime i think is the ultimate long term stress tester, if your system can pass 4/8 hours then it is stable.

some say you only need four hours others say eight, its up to you!
 
Capture-1.png


here is my specs for 4.8 :)
 
buzzlightweight said:
these chips can run hi 80's
Click to expand...

Would aim for under 80 under LINX etc..
buzzlightweight said:
prime i think is the ultimate long term stress tester, if your system can pass 4/8 hours then it is stable.

some say you only need four hours others say eight, its up to you!
Click to expand...

I say 24.;) Enough rigs i test pass 8hrs without a hitch but theres something around that 16-24hr mark that seems to root out some sandybridge problems, no idea what.
 
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