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What is the max safe NB Voltage for Asus P5E3 X38 ?

1544 Views 5 Replies 2 Participants Last post by  Prong, 
Prong
Hi all,

What do you think is the max safe Northbridge Voltage for Asus P5E3 X38 with 45nm Q9400 ?
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Depends on the cooling used.

With the stock cooler and good case air flow, 1.5v. Stock cooler with an additional fan, 1.55v. With one of the better 3rd party chipset air coolers 1.6, possibly 1.65v. Water or better, 1.7v.
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Prong
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Quote:

Originally Posted by Blameless View Post
Depends on the cooling used.

With the stock cooler and good case air flow, 1.5v. Stock cooler with an additional fan, 1.55v. With one of the better 3rd party chipset air coolers 1.6, possibly 1.65v. Water or better, 1.7v.
I have thermaltake Duorb on cpu which known to also help nb cooling but actually I have no idea how much it helps since I can't see my nb temp. But it is very very close to nb. When it comes to nb itself no fan or another thing on it just what is stock that comes with P5E3. My mobo looks exactly same as the one in the pic below.

So I guess 1.5v is max for me and 1.41v which I use for now is safe for 24/7 use ?
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Originally Posted by Prong View Post
So I guess 1.5v is max for me and 1.41v which I use for now is safe for 24/7 use ?
Definitely. The X38 is a pretty durable chip. It's built on a 90nm process and the IHS makes the thermal paste application almost fool proof. That heatsink is also fairly good for a stock cooler.

Quote:

Originally Posted by Prong View Post

If you can do it without damaging anything else, remove that grey metal plate with the AUSU logo. Should allow much more air to pass through the fins with a down drafting cooler.
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Prong
What kind of a 3rd party chipset air cooler can I possibily get for my P5E3's nb that would fit on it ?

Actually 1.5V max for nb seems to be enough for me for now because it doesn't need that much juice for nb even @3.6Ghz to remain stable. With 450fsb I need 1.49v on nb to make it stable which is still slightly under max safe and with 445 fsb for 3.56Ghz 1.41v for nb. With 425fsb for 3.40Ghz only 1.29v. What a difference in values although not much change in fsb freq !!??

But why not keep it cooler ? Maybe it would also allow me to reach higher speeds with special cooling on nb.

Any advices are more than welcome for nb air cooling on P5E3 x38....
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Prong
Any suggestions ?
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