Trouble OC'ing P5WDH Delux

Phunky Phish

Phunky Phish

Phunky Phish

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3 Jul 2006
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St. Neots
I have had to push my Vcore to 1.55v and Mch to 1.6v to get a stable 3.4GHz OC. Temp is stable at 41 oC. Seems high volts for this OC?
I cannot seem to get a stable OC at 3.6GHz, which is where I wanna be!
If I push the Vcore to 1.65v & Mch to 1.65v it will boot, but temps are mid 50's! and under load it dies! Had to leave it half hour to get it to boot back at 3.4GHz settings!!
Anyone got any tips I could try?
I have got TwinX mem wich is running at 380mhz, 1:1 FSB:Dram setting, 4-4-4-12. Would it be worth running at 5-5-5-15 so I can up the bus speed of this? Or would the loser setting be slower overall?
Lastly I have set the PCI-E to 118Mhz, and overclocked the 7900GT's (I think both!!) to Core freq 548Mhz, and Mem freq 783Mhz, using coolbits.
Anyone think I can push this lot a little faster?
I also need to know how to post screen dumps rather than typing all this in!!!

Thanks for the help and comments guys.
 
Whenever i set my PCI-E Frequency to anything over 107 it kept randomly crashing. I think 1.65v on the CPU is wayy too much thats probably past water cooling for long use. Put your MCH voltage up and loosen your ram timmings to get to 400FSB ram running 1:1 and it might work :p I really wouldnt go past 1.55v if i were you.

For image posting you need to upload the screenshot to somewhere like http://imageshack.us/ and post the thumbnail or the whole screenshot depending on the size of it ;)
 
Last edited:
1.65v is too much for the cpu.

lower the pci-e frequency to 105
pci-33mhz
hyper path off
MCH 1.65v

CTRL print screen for screenies
and ALT print screen for active windows.
 
sorry for being off topic... Ihave spent the last hour looking ans searching for the thread showing the mod th the P5W DH to use better thermal paste on the passive cooling.

My cpu is at 31c and the mb at 54, im using a 7950gx2 and the card sits just over the edge of one of the mb coolers.


Apart from the mods anyone got any idea how to reduce the temp?

I have a 12cm fan on the front and back so all seems ok there.

Will an additional side fan make any difference?
 
rich1231 said:
sorry for being off topic... Ihave spent the last hour looking ans searching for the thread showing the mod th the P5W DH to use better thermal paste on the passive cooling.

My cpu is at 31c and the mb at 54, im using a 7950gx2 and the card sits just over the edge of one of the mb coolers.


Apart from the mods anyone got any idea how to reduce the temp?

I have a 12cm fan on the front and back so all seems ok there.

Will an additional side fan make any difference?
Click to expand...
The 40mm fans is a cheap and fast option, takes all of 5 minutes.
http://forums.overclockers.co.uk/showthread.php?t=17611562&highlight=tim
 
5 mins, would i have to take the MB out of the case? To get underneath the remove the pins, or will it just lift off?

I have some Artic Sliver Mx-1 paste as well. Would that be worth trying?
 
rich1231 said:
5 mins, would i have to take the MB out of the case? To get underneath the remove the pins, or will it just lift off?

I have some Artic Sliver Mx-1 paste as well. Would that be worth trying?
Click to expand...
You can put some fans on it without lifting it out or taking out the pins.
 
If you are using PCProbe 2 or similar, be aware that the actual core temp can be 15-20C higher. So a load temp of 55C might give an actual core temp of 70-75C. Use "CoreTemp" to get a realistic indication of the core temp.

Also, because Asus uses their PEGLink nonsense in a Bull-in-Chinashop-O-matic fashion, if you've got a "suitable" ATI or nVidia grahics card, don't set the PCI-E bus speed to anything but "Auto". This is because of the unpredictable nature of what settings will be used by the Wizard Ahsus. You might be running the card at 120MHz for all you know when you are setting it to 101MHz.

These Taiwanese will do anything to make their board seem faster when in fact it's being overclock out-of-the-box. They've learnt this from their yankee masters, the art of deception.
 
I have now turned PEGLink to normal!
I will try and loosen the ram timings to speed this up to, and do some bench marks to see if it is any better!
Then will try upping the FSB again with the looser timings to see if will clock higher with some stability!
I think my temps might be high as got the in/out feeds to the CPU block the wrong way round I think! There are extra fins under one barb, which I am not using as the cold supply! So will swap that and hopefully drop the CPU temp some!
Also, I am now having some other problems! The fan speed is the RPM from the pump, so I can see it! But the pump is run through a fan controller and I think the current drawn is blowing the controller! As it does not like to restart after a couple of hours use!
Also, when I use PC probe and CPU-Z, the probe returns core temps of 250 deg C plus !! Its very irratic!
Also I messed up the feed to the pump! As instead of returning to the resv then into the pump, it goes striaght into the pump, so air is not being bleed as well as it could!
Lastley! I have an internal USB card reader, which now I am overclocking the PC, has decided it does not want to work! It runs off a header. It shows on post but not in windows. Could it be I need to set my PCI bus to 66mhz?

Thanks for all your help and comments guys
 
PCI bus should be 33Mhz.

You not running the pump of the motherboard header are you?

If you are, can't you just take the RPM wire to the correct pin on the MB and power from a molex.
 
Its a DDC Plus pump. Comes with a molex connector (which I have fitted to the fan controller) and a seperate 3 pin to be fitted to the CPU fan header, so that the mobo knows its spinning!
Would work fine if it did always spin up!!
 
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