duron 750->900 oc. please comment

[tdc]

hi guys,

i'm basically just a beginner at this, after i read couple of texts i decided to oc my duron 750 a bit

the reason it's only 8.5x106 = 900 is the temp.. :(

all i have for cooling is the hsf i got with the processor (duno the name, probably brand-less.. looks big though :), plus an extra fan in case

what's more, it doesnt even have thermal paste (!), only this stick-on pad crap...

so no wonder my temps after the oc are pretty high.. (around 39C idle, 45C under load - with system temp 27C). (however, before oc i had 38C under load - pretty high also).

i upped the voltage to 1.7v too..

questions are:
1. should i really invest in some hsf? or thermal paste? how high (temp) can i go?
2. also, i see guys talking about amd's at 150+ fsb. mine wouldn't go stable above 112-114... how they get so high fsb's ??
3. how come my +12v voltage is always around 12.6? just curious

thanks a lot for your time, comments and help in advance

[Tachyon]

tdc (Mar 09, 2001 06:04 a.m.):
hi guys,

i'm basically just a beginner at this, after i read couple of texts i decided to oc my duron 750 a bit

the reason it's only 8.5x106 = 900 is the temp.. :(

all i have for cooling is the hsf i got with the processor (duno the name, probably brand-less.. looks big though :), plus an extra fan in case

what's more, it doesnt even have thermal paste (!), only this stick-on pad crap...

so no wonder my temps after the oc are pretty high.. (around 39C idle, 45C under load - with system temp 27C). (however, before oc i had 38C under load - pretty high also).

i upped the voltage to 1.7v too..

questions are:
1. should i really invest in some hsf? or thermal paste? how high (temp) can i go?
2. also, i see guys talking about amd's at 150+ fsb. mine wouldn't go stable above 112-114... how they get so high fsb's ??
3. how come my +12v voltage is always around 12.6? just curious

thanks a lot for your time, comments and help in advance

You're actually doing ok considering what you're working with.

A quality HSF and thermal paste will help you a lot. Thermal pads don't work very well at all. If you stay in the mid 40's with your temp's you'll be just fine. With a good HSF you can take Vcore above 1.7 with no problem

The folks with 150+ FSB speeds have a KT-133A motherboard. 111-114 on a KT133 board is pretty darn good.

Terry

[Hoot]

First off, don't worry about the +12. The regulation in most PC PSUs are not precise. Luckily, it's not that critical.
Second, your temps are pretty good. About the only improvemnet you might see is removing the pad and using a quality thermal compound like Arctic Silver. Be careful relying upon the thermistor under your CPU as an accurate indicator. When I got my KT7A, the thermistor was not in contact with the CPU base. I had real nice temps with my FOP-32 HSF. The I did some reading and got a little more informed. I removed the CPU and bent the thermistor leads up to the point where the thermistor waspressing against the bottom of the CPU. While I was in there, I put a small dot of thermal compound on the thermistor where it contacted the CPU bottom. Upon reassembly, my tems were 3 deg higher. I read some more and again got more informed. I removed the CPU again and bent the thermistor leads further to place it excatly under the center of the core. I remounted everything and the temp went up another 3 degrees. Also, the response of the thermistor was faster as the temp changed during warmup. I was bummed. all this research and work and now my CPU was running 6 degrees warmer! :-) The fact was I was seeing a more accurate representation of my actuall core temp.
An easy way to assure your thermistor is touching the CPU bottom once the CPU is installed. bend the leads on the thermistor until it looks like it protrudes a little above the surface of the socket. Now, when you set the CPU in the socket, it should ride a little high. Press it down and lock the base. Now you can be certain it is touching the CPU bottom.

To verify my results, I took an HSF I not longer use and bore a small hole in it just big enough to fit a thermal sensor into that rested on top of the core, about 1mm. Using an external thermal meter, I verified the the thermistor under the CPU was within .4 degrees of the more precise Thermal meter. sensor. That is good enough for me. There is still an inaccuracy of as much as 3 deg during temperature transition, either up or down, but once the temperature stabilizes, they read very close to one another.
Sorry for the long elaboration, but reading these kind of posts over time, it is evident that many users don't understand this simple concept. i hope this reply helps you and others who read it.

Hoot

[Hoot]

I gotta start using spell check... :-)

Hoot

[Tachyon]

I agree Hoot. As good as forums are for getting the word out, there is still a lot of misinformation being promulgated in cyber land :)

Terry

[tdc]

Thanks a lot for the info Tachyon and Hoot...

About the "misinformation".. See, I didn't even know where/what/how the thermistor is attached to the CPU :)... I'll try bending it a little. Knowledge comes with time, right?

Also, about the high FSB... I'm almost embarresed about this ;p I totally forgot about kt133a boards...