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i7 920 OC @ 3.4 Ghz

post #1 of 9
Thread Starter 
I'm rather new to OCing, I only just started OCing through BIOS the other week by a small amount. My stock CPU speed is 2.66 Ghz, I then OCed it to 3 Ghz just to get used to the BIOS and OC temp settings etc.

Tonight I tried a jump from 3 Ghz to 4 Ghz, I ended up BSODing a few times and got to a point where my PC wouldn't even boot properly and I had to clear my BIOS settings frown.gif.

After I cleared my BIOS I OC'd my CPU again and this time I OC'd it to 3.4 Ghz and I have been running prime95 just over an hour and nothing has happened so far.

I wanted to know if my temps are high for this OC or if it's good and also if i'm using too much vcore etc.

Here is a picture of my temps/cores etc.
Temps3.jpg

If possible I would also like to know what I need to increase to get a bootable/stable 4Ghz. If I'm missing any details feel free to ask.
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post #2 of 9
What are your complete system specs? Welcome to OCN wink.gif
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post #3 of 9
Thread Starter 
I'll update my profile now so that you know my system specs, sorry. I completely forgot.
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post #4 of 9
Have you turned off alll your power saving crap in bios? If no here is a short definition of each that you need to turn off.

C STATE TECH
Its a technology by intel which allows the OS to independently lower the frequency of the cores when the need be thus saving power. If it's disabled then both the cores will run at a fixed frequency. Enabling it will allow the OS to make the core's run at different frequencies thus making optimum use of power. TURN THIS OFF

C1E SUPPORT
reduces your multiplier and voltage to your CPU when it's performing routine tasks that don't require much.

C state tech and C1E support are power saving features. Its best to turn these off while overclocking so your volts and frequencies don't change on you.

CPU TM FUNCTION
TM function is your temperature safety shutdown, if you go higher then the cpu thermal design it will shut down or seriously throttle down automatically

When overclocking you will exceed the thermal design so leave TM function off.

EXECUTE DISABLE BIT
Execute Disable Bit is a system feature that, if present
and enabled, allows the notebook's processor to
distinguish between bits of code that should be
executed and the ones that cannot be, as they pose a
threat to the system.

Your choice to turn Execute disable Bit on or off

LOAD LINE CALIBRATION
If you've disabled C1E and SpeedStep, then turn on Load Line Calibration. Otherwise, leave it at auto/disabled. This feature helps with VDroop.... I KEEP THIS ENABLED

SPEEDSTEP
that allow the clock speed of the processor to be dynamically changed by software. This allows the processor to meet the instantaneous performance needs of the operation being performed, while minimizing power draw and heat dissipation. always keep this off.

If you need any help just hit me up, and welcome to OCN smile.gif
Edited by Warfox101 - 11/5/11 at 1:39am
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post #5 of 9
what's with all these i7 920s all of the sudden?

best source . . .

http://www.overclock.net/intel-cpus/538439-guide-overclocking-core-i7-920-930-a.html
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post #6 of 9
with that silverarrow u should be able to push 1.35v + and still be temp safe
post #7 of 9
Quote:
Originally Posted by rdr09;15580419 
what's with all these i7 920s all of the sudden?

best source . . .

http://www.overclock.net/intel-cpus/538439-guide-overclocking-core-i7-920-930-a.html

My guess is BF3 and people buying used 920s/930s.

Back on topic: To the OP, I have the same board as you and I have a 930 that I never pushed stably past 3.8. However, I get 3.8 GHz with core voltage set to "Normal" in BIOS. That's 1.2125 for me. I also have LLC-1 enabled. I have HT on and I have speedstep enabled. Idle speed drops the core voltage down to .944 or so as shown by CPU-Z. I can pass Prime 95 overnight and 20 runs of IBT. I have vDIMM set to 1.60, QPI/VTT set to 1.255 and I left other voltages on auto. I also use BCLK to 181 with multiplier 21. I get a RAM speed of 1448 because I use the 8 multiplier for memory. RAM timings are on auto and that gets me 9-9-9-24-74-1T although my RAM is spec'd for 8-8-8-24-34-2T at 1.65 in the XMP profile that I don't use. Every chip is different with 920 d0s like you have normally being pretty good. I'll bet you can do what I can do with mine with similar or less voltage.

As for 4.0, I used BCLK 191 with the 21 multiplier. I bumped vcore to 1.2625 with LLC-2 and left the rest alone. It's not stable. I test ran Prime for 20 minutes or so without crash, but IBT reported a failure on the 8th run. I don't think I'd have to go much higher in vcore, maybe 1.275 with LLC-1, but I don't want temps over 70.

Anyway, hope that helps with your overclocking.
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post #8 of 9
Thread Starter 
I have a feeling that my OC failed because I forgot to change the voltage to my RAM can't remember exactly and I shall give it another go when I got the time to OC it using a 21 multiplier since at the moment I'm using 20 multiplier.

Also an update on the prime95 torture test, I've ran it for over 10 hours now with no problems at all using the small FFT's and the temperatures never went to 70.

A little off topic reply too, I had my 920 ages ago tongue.gif Just didn't try OCing till recently for better perfomance.
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Intel Core i7 920 Bloomfield GA-X58A-UD3R Geforce 570 1GB PoV 8GB Corsair XMS3 1600 
Hard DriveOptical DriveOSMonitor
120GB Corsair Force 3 SSD 2x 1 TB Samsung Raid 0 HDD Windows 7 HP w2207h 
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post #9 of 9
run the large ffts it will get a lil bit hotter and i think the best stability test is blend cuz that tests alot of ram in conjunction with blistering 100% cpu loads.
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