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2600K 1.9v Spikes!!

post #1 of 30
Thread Starter 
Hi all, after getting myself a new 2600K, P8P67-EVO and 8GB G.Skill ECO 8-8-8-24 I did the usual and proceeded to manipulate my overclock.

Now I can get the 2600K stable at 5Ghz but at 1.525v. Now while using any monitoring program (cpuz, probeii, coretemp) I see little spikes every now and then that go up to 1.9v. Sometimes itl stay at 1.9v for a good 3 seconds before it drops back. It seems to do this even when I have all the VRM LLC etc stuff turned down to default regular. Now before you panik the core has not been too hot as i've got a NH-D14 and at load the temps never get over 79c. Also I understand there is alot of information saying that 1.375v is the maximum but i'm happy to take the risk as I didn't buy a K series chip to go easy on it. Saying that though I feel the random spikes are more risky than simply using 1.5v and keeping it cool.

Anyhoo, can anyone tell me why these random spikes keep happening and how I can maintain just a constant voltage during turbo mode? If I turn everything back down to stock volts and multi no higher than 4.5 it works fine and does not spike at all.

I mean asides from me complaining about the spikes it runs like a dream. Does anyone else maybe just ignore the spikes?
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post #2 of 30
Wow - 1.5 for 5 ghz.... What Vcore do you need for 4.8?

Does your voltage wall start at 4.9? Just wondering because most chips can do 4.4-4.6 on stock volts, with maybe a little bump. But adding .3 volts seems extreme
post #3 of 30
Thread Starter 
I get 4.5Ghz on stock volts. 4.6Ghz on stock volts with all the VRM + LLC stuff to extreme.
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ForceGT120GB + WD Greens HVD soon (2016) Windows 7 Home Premium Viewsonic 22" 1080p 2ms 
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post #4 of 30
LLC may be responsible for the spikes, are you able to get 5 with a lower LLC setting.

With 4.5 on stock having to go to 1.5 seems pretty strange. Can you do 4.8 at like 1.35?
post #5 of 30
Thread Starter 
Yes here are the following values.

stock 1.2v 4.5Ghz
stock 1.2v + VRM LLC etc on extreme 4.6Ghz

1.3v 4.8Ghz
1.425v 4.9Ghz
1.525v 5Ghz with or without VRM + LLC still get spikes here but stable
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CPUMotherboardGraphicsRAM
Intel 2600K @ 1.24v @ 4.4Ghz Asus P8P67-EVO Nvidia GTX470 8GB G.Skill ECO DDR3-1600 
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Hard DriveOptical DriveOSMonitor
ForceGT120GB + WD Greens HVD soon (2016) Windows 7 Home Premium Viewsonic 22" 1080p 2ms 
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post #6 of 30
I'm a bit curious that LLC on or off isn't related to the spikes. But before everyone else says it, adding .1 volts for 100mhz seems like a bad tradeoff. I know you claim your temps are fine but that is a serious amount of volts to run through a chip.

If you are dead set on 5.0 you can try upping you bclk to 102 with the 49 multi or lowering it to 98 at the 51 multi.
post #7 of 30
Sorry if i'm going off topic, but if you can get 4.5 with stock volts you shouldn't need 1.525v for 5GHz.

Do you have 4 sticks of RAM?
post #8 of 30
i think those volts are a tad bit too high... the current 2600k i have running right now needs 1.476v at (100.1 x 50 multi)

let me get this straight... your vcore is spiking to 1.9v?

EDIT: i agree.. what is your stock vid? 1.525v is really high, especially with llc on

The highest i've ever gone was 1.8v on liquid nitrogen on my 980x... not sure how a 32nm chip will fair even if it's just for seconds
Edited by badatgames18 - 5/13/11 at 8:13am
Galbus
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Galbus
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post #9 of 30
Ouch that is not safe! Seems like something might be up with the VRMs.
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post #10 of 30
Thread Starter 
Yeah I tried touching the base clock but it did not like it one bit. Even at base clock 102Mhz I got a BSOD after running prime. Changed it back to 100Mhz and all fine. I think you are right though the extra volts does not seem worth the gain and I may be at the limit of the overclock now. Really wish I could just stop the spikes, for the time being i'm going to run at stock volts 4.5Ghz till I can figure out why this is happening.

I want to try disabling turbo mode and speedstep just to see if they are causing the spikes somehow but if it were to spike worse at constant clock it could do more damage.

Hmm, i thought this motherboard was supposed to offer stable voltage. Would it have been so hard to add a vcore voltage spike protection circuit so you can stop anything over 1.55v? lol
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Intel 2600K @ 1.24v @ 4.4Ghz Asus P8P67-EVO Nvidia GTX470 8GB G.Skill ECO DDR3-1600 
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ForceGT120GB + WD Greens HVD soon (2016) Windows 7 Home Premium Viewsonic 22" 1080p 2ms 
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CPUMotherboardGraphicsRAM
Intel 2600K @ 1.24v @ 4.4Ghz Asus P8P67-EVO Nvidia GTX470 8GB G.Skill ECO DDR3-1600 
Hard DriveOptical DriveOSMonitor
ForceGT120GB + WD Greens HVD soon (2016) Windows 7 Home Premium Viewsonic 22" 1080p 2ms 
KeyboardPowerCaseMouse
Xarmor U9BL-S NZXT HALE90 80PG 650w Coolermaster HAF 912 Plus Razer Deathadder Respawn 
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