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I'm stuck - i5 2500k

post #1 of 26
Thread Starter 
I spent a day trying to make my 2500k stable at 4.5GHz with p95 blend. I was able to get no errors for a couple hours with small FFT, but between 1-2 hours of blend, I get errors. No BSOD.

Here is an overview of what my BIOS settings are:

C1E, C3/C6 disabled
BCLK disabled
LLC enabled
PLL Overvoltage enabled
No turbo

I have tried several configurations in voltage that include Vcore, PLL, and VTT and my best attempt (longest without errors) was Vcore 1.365, PLL 1.6, VTT 1.05

I am not comfortable going over 69 degrees and my Vcore set to over 1.37 may do it.

I am using a gigabyte p67a-ud4-b3

Thanks for help. My target is 4.6GHz.
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post #2 of 26
You can fill in your system specs @ your userCP looks more organized then.

Also, it would help what kind of ram you are using.
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post #3 of 26
Thread Starter 
Thanks for that. My signature was outdated anyways ;p
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post #4 of 26
Bump up your vcore one more notch.
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post #5 of 26
Thread Starter 
Is the common solution for instability to increase Vcore?

I am a noob at this, so pardon me, please.

I am running a blend with Vcore at 1.375 now and in the mid 60s right now. My buddy says over 70C is risky.
Edited by zaq - 10/24/11 at 3:10pm
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post #6 of 26
iwe been mucking about with my i5 for a long time. put PLL to 1.9v, VTT 1.15v LLC- Level 6 and PCH increase it just a touch
post #7 of 26
A sad but typical story - scared of voltage and heat 69 is pretty conservative, thermal throttling is at 95C so you're leaving yourself lots of headroom. Most recommend peak temps of 80-85C as max, 70 is pretty conservative. Max temp on a bench test is *not usually* what you will experience in daily useage - possible but very unlikely. For example, I bench test and peak around 70C (have better cooling than you, just using for illustration) but full on gaming load I have never seen 60C and more typically 55C. My point being, that if you are limited your max peak to 69C on air cooling, you are probably limited your potential overclock.

A slight vtt bump to 1.10 has help some, some go higher up to 1.20. I have my pll at 1.710, seems to work best there - your system may vary, but stock is 1.800.

C1 can be left enabled.
BCLK disabled, that's an interesting trick. Not sure what you mean there.

What level of LLC (range = 1-10)

The typical best method of overclocking is to leave the cpu multi at stock (33) and enable turbo and set the turbo speed for each core to your desired speed (45X in your case).

Your memory settings are important. Turn memory turbo OFF. Set the speed manually using the correct multi for your memory (13x, 16x, 18.6x) and when the option pops up 'Standard/Quick/Expert', just use standard as a starting point. Then, set the voltage for your memory (DRAM) manually as well, it will likely be either 1.50 or 1.65.
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post #8 of 26
Quote:
Originally Posted by zaq View Post
Is the common solution for instability to increase Vcore?

I am a noob at this, so pardon me, please.

I am running a blend with Vcore at 1.375 now and in the mid 60s right now. My buddy says over 70C is risky.
Yep, just watch your temps. If you bump it up one notch at a time it's not gonna jump up to 90 degrees or anything. You should be ok from low-mid 70's. Some people go high 70's and in to the 80's. (I don't recommend that though).
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post #9 of 26
Quote:
Originally Posted by zaq View Post
Is the common solution for instability to increase Vcore?

I am a noob at this, so pardon me, please.

I am running a blend with Vcore at 1.375 now and in the mid 60s right now. My buddy says over 70C is risky.
Not all the time. I'm at 4.8GHz 1.375v. There are tons of other settings you might want to change.
post #10 of 26
Thread Starter 
Quote:
Originally Posted by keto View Post
C1 can be left enabled.
BCLK disabled, that's an interesting trick. Not sure what you mean there.
What I mean is the control is disabled.

Quote:
Originally Posted by keto View Post
What level of LLC (range = 1-10)
All that I have seen are 3 options - Auto, Disabled, and Enabled. :\\

Quote:
Originally Posted by keto View Post
Your memory settings are important. Turn memory turbo OFF. Set the speed manually using the correct multi for your memory (13x, 16x, 18.6x) and when the option pops up 'Standard/Quick/Expert', just use standard as a starting point. Then, set the voltage for your memory (DRAM) manually as well, it will likely be either 1.50 or 1.65.
I have done all of this Sorry for not being specific in my settings. I am busy with dinner and stuff.


I will consider using the turbo feature as my overclocking method. It's something I didn't think of or read about, but it sounds interesting! Thanks.
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