** The Official ASUS P5N-E SLI & Ultra 650i Thread **

Teki187 said:
Appreciate the reply thanks.

This board for me seems to be very temperamental with volts.
Click to expand...

I’m not sure what you mean :confused:

If you find that lower NB voltages are more stable than higher ones you more than likely have an overheating chipset.
There are a few things you can do to solve this issue.
 
Hesky82 said:
I’m not sure what you mean :confused:

If you find that lower NB voltages are more stable than higher ones you more than likely have an overheating chipset.
There are a few things you can do to solve this issue.
Click to expand...

Well I've had it overclocked at 3.2ghz cpu and 800mhz memory on 1:1 for a while now and i can never find the right volt combinations to keep the computer stable.

It just seems to make Vista freeze and you have to force a restart.

EDIT:

Just setup the system with:

1.55v cpu
2.2v mem
1.5v NB

Lets see how this goes.
 
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Dude there is no such thing as voltage combinations, trying to shoot for an overclock and not actually stability testing each individual component is not the right way to go. Build up slowly, test stability at each frequency. It makes your life a whole lot easier than just trying voltages at random!
 
How are these boards doing with the Wolfdales?

Will be buying an 8200 in the next few days and not sure whether to upgrade the board to a P35.

I'm not really wanting to change the board as my P5N-E has been rock solid since day one.
 
wolfdales can hit nasty fsb walls even on intel chipsets. but I still think 450*8 (3600MHz) is possible on this board with the e8200, then again that fsb could be pushin it. e8400 would be a better choice though
 
Here is a graphic illustration of the problem this board has with quad core CPUs. Graphs from a 1 hour run of OCCT, QX6700 at 3.0GHz:

MIX test

Firstly the 12v line - totally stable
http://www.chesstesting.org.uk/Volt12.png

And now the vcore - a disaster
http://www.chesstesting.org.uk/VCore.png

I have a BIOS setting of about 1.38v. At idle straight away there is vdrop - the reading is 1.33v. Then under load, it drops to as low as 1.18v - vdroop
This is not a PSU issue, the board just can't supply the voltage that an overclocked quads demands. Prime 95 is the same too, the vcore drops depending on the FFT size that it is running. But, despite this, the machine passes OCCT and is also Prime95 error free for 24+hrs

On the CPU only custom test, the vdroop is clearly seen, but the fluctuations here are quite small - that's good at least...
http://www.chesstesting.org.uk/CPU_Only_Test_VCore.png


I must try this on my Gigabyte board with a Q6600 - maybe that vcore fluctuation is common
 
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Tuvoc, that behaviour is just typical of a 3 phase power supply design. Quads need a decent 6+ phase board to clock well, with that arrangement you get much less vdroop.
 
Hesky82 said:
Tuvoc, that behaviour is just typical of a 3 phase power supply design. Quads need a decent 6+ phase board to clock well, with that arrangement you get much less vdroop.
Click to expand...


Yes agreed. Amazingly it is totally stable 24/7 under 100% load and has been since the day it was built about 12 months ago. I ran it about 9 mths at stock and about 3 mths ago did the overclock. The graphs would look the same I think even at stock speed, I observed the same vdroop and fluctuation at stock speed when Priming. It says something about the excellence of the Intel CPUs that they are rock-solid under those conditions.
 
Yup, my Q6600 performed identically to your QX on my old P5N-E, all it needed was 1.19v to run rock solid stable at 3GHz. Just couldn’t get it any higher than that clock so the board had to go!
 
Hi all, ive had this Mb for about a year now, have overclocked it on and off during this time...... running default atm with a E6600, today i thought i'd give it a little overclock, so went into bios made some changes, fsb/volts/mem timmings, pressed F10 to exit, and booted into windows, but..... to my surprise once in windows cpu-z shows my cpu still @2.4 and my ram timmings 5-5-5-15 instead of 4-4-4-12 which they are set in to bios.
any 1 got any ideas *** this could be. many thx
 
You may have to disable some settings 1st before you can apply certain overclocking values. Also change a value at a time, changing FSB and ram latencies at one is never a good idea.
Cast your eyes over some posts on this thread with regards to setting the bios up for overclocking.
 
well i have loaded the default settings and started again, so ive just set my ram timmings in the bios, but still in windows (cpu-z) its shows my timmings as 5-5-5-15,even if i just up the FSB 10mhz is dosent change in windows or in the bios, the changes only show in the overclockin section in bios
 
Id suggest updating to the latest bios, I know your hardware would have been supported even by the initial bios release but improvements have been made and its easy to do with asus ez flash. It does sound like your bios is a little corrupted.
 
after i noticed i couldnt change anything i flashed it to the lastest version last night, but stil the same, any overclock or mem timmings save in bios, although cpu speed in bios still says 2.4, and mem timmings are as if i set to auto, although ive set them to 4-4-4-12
:/
 
ok i hope this works :/

screen 1-bios fsb



screen 2- cpu config in bios



screen 3-ram timmings in bios



screen 4- cpu-z orthos- desktop



as you can see i set the fsb to 1200 in bios, set ram to 4-4-4-12, qiut and save, go back into bios to take these pics, and although the fsb and ram timmings show as i've set them, cpu config in bios still shows cpu @2.4.
also once in windows, i hope these picutes are any help. :)

also after posting on Asus forums, someone suggested setting bios to default, and reflashing, which i did, just before taking these picutes :/
 
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