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E8400 to 3.6GHz

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  • CPUs
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June 6, 2009 12:25:46 AM

ASUS P5Q Pro, E8400, 2x2GB G. Skill Pi Black DDR2-800 4-4-4-12, Arctic Cooling Freezer Pro 7

Ok, so I changed the following in my BIOS.
FSB-400x9=3.6
CPU Voltage-1.225
PCIE Spread Spectrum-Disabled
CPU Spread Spectrum-Disabled
C1E-Disabled
Speedstep-Disabled

I also have manually set my RAM timings to 4-4-4-12, and voltage to 1.9.
The thing I'm wondering though is that if the CPU voltage looks ok. I've been running Prime95 for 3:30 now and will run it until tomorrow morning. The CPU temp is at ~50-52 now which is decent. If you have anything advice to throw on voltage or anything else please do.

More about : e8400 6ghz

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June 6, 2009 12:30:26 AM

I just change my multiplier to 400x9 and the RAM voltage to 2.0 and leave everything else at auto with C1E and Speedstep enabled.
June 6, 2009 12:32:08 AM

Why change the timing back? It's 4-4-4-12 memory. And should I stop prime95 to change it or wait till tomorrow?
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June 6, 2009 12:37:52 AM

Well, I'm new to OC'ing and I'm just going for 3.6 atm. How will I know if it is stable after I stop Prim95 tomorrow? If it doesn't crash or what? Also does that voltage look too high/low to anyone? I kinda just threw 1 out there to see if it worked.
June 6, 2009 1:01:18 AM

Set timings to 4-4-4-12 and dram voltage to 2.0v and cpu voltage to 1.300, set dram:fsb 1:1 then raise fsb to 400.
Everything should run stable. Did it this way on the Gigabyte EP45-UD3P and its running stably ever since in a friends rig after running prime.
June 6, 2009 1:07:58 AM

Isn't 1.3 a bit high for a 3.6 OC? I thought my 1.225 was high. Also I'm pretty sure RAM is supposed to be 1.9 for my RAM.
June 6, 2009 1:35:26 AM

it depends on the vdroop. I the vdroop is not big you could adjust till you get the lowest stable voltage the proc runs at. Besides you are using a different mobo, the P5Q Pro.
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June 6, 2009 2:13:50 AM

my e8400 needs 1.33 for 4ghz to be stable
June 6, 2009 2:19:32 AM

Well, if my E8400 w/ 1.225V runs prime95 for 18 hrs+ (I plan to stop it in the morning after I wake up) and doesn't BSOD, does that mean that it's stable at that voltage?
June 6, 2009 2:21:39 AM

there are two processors in question here the E0 stepping and the C0 stepping.
Which one do you have?
June 6, 2009 2:23:36 AM

E0 is what it says for revision on CPU-Z.
June 6, 2009 2:41:37 AM

The E0 is a much newer stepping which does not require as much voltage bump as the C0. I used the C0 therefore the 1.3v. Your 1.225v should be fine if it breaks the 24hrs barrier.
June 6, 2009 2:43:33 AM

Thanks for the reply cybot. I'll post back tomorrow around 4 central (24 hour mark) to post the results ^^
June 6, 2009 2:46:01 AM

Any time bigballer044 :) 
You are welcome.
June 6, 2009 4:46:52 AM

Keep the ram setting at 1.90V in bios at 4-4-4-12 timings. Make sure your NB Voltages are at 1.33v-1.35v. Also what is your VID? Use Core Temp to check it. I have the E8400 E0 stepping also and I need to have my voltage at 1.275V in order to run it at 3.6Ghz. Don't forget that every cpu is different. Also I would use LinX for 25 passes and then prime 95 for about 6 hours.
June 6, 2009 4:51:02 AM

Ok, it says my VID is 1.25. I left the NB as Auto, is that ok?

Is it a bad thing that I set my CPU Voltage to less than my VID? D:
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June 6, 2009 2:31:50 PM

I wish I had yur CPU. My e8400 needs 1.32 v for 3.6 Ghz and 1. 37 v for 4.0 Ghz.
It has the AC Freezer Pro 7 but runs hotter than yours reaching in the low 60s C under full load.
June 6, 2009 9:17:15 PM

Ok, Prime95 Small FFTs- Test ran 24 Hours, 1 Minutes - 0 Errors, 0 Warnings. The average temperature I saw was probably ~50C and highest 53C.

I rebooted and ran 3DMark06 without problems, and got (GTS 250 Vid Card)

Total: 14,928
SM 2.0: 7024
SM 3.0: 6828
CPU: 3352

About 1.4k higher than before OC.

Guess it's stable for gaming/everyday use now huh?
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June 7, 2009 6:40:29 AM

I use a GTS 250. Make sure you set the fan to at least 80% before a session of Crysis or CoD4 or it will go past 80 C.
June 7, 2009 11:14:11 AM

Should I try and lower my voltage? Or does 1.225 look ok if it runs stable?
!