Overclocked q9450

inf|Nemean

inf|Nemean

inf|Nemean

Associate
Joined
29 May 2009
Posts
49
Hello Guys,

I overclocked my Q9450 to 3.2Ghz, but somehow my computer starts freezing.

My voltage at the time it happened was 1.25. But when I look at CPU-z, it is much lower for some reason.

Also with 100% load in primetest it goes lower instead of higher. What can make this problem happen?

Here is the screen with primetest95 on.

amb2us.jpg


As far as I know are my temps ok.. but I guess my voltage is to low.

My system specs;

Intel Core 2 Quad Q9450 @ 3.2Ghz with Scythe Mugen 2 and Xigmatek XLF-F1253 120mm fan.
XFX nForce 780i 3-Way SLI Intel
Corsair Twin2X 4GB DDR2-800 CL5 EPP DHX kit
MSI N280GTX-T2D1G-Super OC

What could be the problem that my pc freezes?
Also why is my Voltage lower @ 100% load.. instead of its voltage I entered in the BIOS?
 
If your getting sudden massive voltage drops the first thing that comes to mind is you have speedstep or C1E on.


Getting overclocks above ~3.2gig on a 45nm quad and an nForce board starts getting fiddly... I've just spent 4 hours tweaking GTLREF lane voltages just to get a stable overclock... you've also got to be very careful about VTT voltage.
 
Last edited:
Oh and massive vdrop/vdroop on nForce boards as well...

with 1.325 set in the BIOS I see 1.29 in windows and 1.24 with 100% load on the CPU.
 
Don't set the voltage to auto, just put it up a bit to counteract the low readings. Don't stray beyond or even too near to 1.4V for the CPU though. Look to see if load line calibration is on your board - it basically is designed to up the voltage on load so that it doesn't drop like that. It could be called something different on your board.
 
Rroff said:
How near to 1.4 would you call too near? I'm upto 1.3625 BIOS to get my Q9550 stable at 3.825gig.
Click to expand...

That's fine. 1.4V 24/7 on a 45nm chip could be pushing it though, some have died prematurely when on this or just above.

What you're running is a substantial overclock, so more voltage is necessary, but it's still well within what's safe for the q9550.
 
I've turned from 1.25 to 1.3 and now primetest is running test 4, so far so good.

Also I couldn't find Load line calibration, but my C1E is on, should that be off?

Cpu-z Shows 1.232V
and HW-monitor shows; 1.23

Temps on load 100% are;
Core 0: 55
Core 1: 48
Core 2: 47
Core 3: 47

Are these temps fine?
 
Last edited:
Cpu-z Shows 1.232V
and HW-monitor shows; 1.23

Temps on load 100% are;
Core 0: 55
Core 1: 48
Core 2: 47
Core 3: 47

Are these temps fine btw?

Edited my post you might know it.

Thanks for the help guys, really helps me out.
Also I will turn it off. :)
Test 5 is running now.

When can I be sure it is stable?
 
Temps look respectable.

Personally I consider a CPU stable enough for general use if it passes an hour of OCCT testing (its roughly equivalent to 5 hours prime)... to be sure I usually let it run for 2 hours and finish up with a few passes of intel burn test.
 
You must log in or register to reply here.
Back
Top Bottom