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Help with OC a i5 2500k - Page 2

post #11 of 14
Quote:
Originally Posted by wy2sl0 View Post
I have been testing on and off last night and have now seemed to have found the perfect voltage of 1.31v-1.32v on load for stability (3.1gb IBT 20+ pass) so we are almost exactly the same. My temps also peak around 60-62*C - almost identical. I would say you are solid. Do not run IBT for 24 hours, not even for 10...completely unnessecary and detrimental to your processors life.

20-25 passes at your highest memory is more than enough to simulate what you could real-world stress the PC.
You can up your pll a little then bring that vcore down to keep it cooler.
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Gene-Z Dedi
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Captain America
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CPUMotherboardRAMHard Drive
i7 2600k @ 5.2 Ghz Asus Maximus IV Gene-Z Gskill 2133 4GB Caviar Black 
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Corsair H100 Arch x64 OCZ 650 Watt 
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post #12 of 14
Quote:
Originally Posted by JedixJarf View Post
You can up your pll a little then bring that vcore down to keep it cooler.
Options for CPU PLL Overvolt are enable, disable, auto.....Before putting on Enable vcore required for 4.5ghz was 1.36-1.38.
post #13 of 14
Thread Starter 
Nice, I'll make sure I put the PLL overvolt to "enabled".

Don't worry I didn't run IBT for that long, just 20 runs. I ran OCCT overnight though, since I've been reading that's pretty common. No problems whatsoever, peaks at 62C, and bounces between 1.31 - 1.33 vcore. Glad to see the results are consistent.
post #14 of 14
Thread Starter 
Update:

So I made a pretty stupid move. My BIOS was only v1.1, and didn't have the LLC or PLL overvolt options, so I decided to update it, thinking that shouldn't cause any issues.

Well, after updating it, I'm now having instability issues with running 4.5Ghz @ 1.31-1.33vcore. I'm not sure what LLC and PLL overvolt settings were defaulted to before, but I'm pretty sure those are the issues.

Running with 1.3 "fixed" vcore @ 45x, with speedstep disabled and level 1 LLC, IBT causes the multiplier to sit down at 43x, with core voltage at 1.32vcore. I'm guessing this means the vcore can't get high enough to sustain 45x.

My concerns now:

What LLC setting should I use? (Auto / Levels 1-5)

What Speedstep setting should I use? (On / Off)

Should I turn PLL overvolt on?

I'm running at "fixed" 1.3 vcore, should this be "offset"?

Makes me sad that I had it, and now I gotta work to get it back
Edited by leto88 - 1/26/11 at 7:25pm
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